inditement (n.) Look up inditement at Dictionary.com
1560s, "action of writing prose or verse," from indite + -ment. Perhaps modeled on French enditement (12c.).
indium (n.) Look up indium at Dictionary.com
metallic element, 1864, Modern Latin, from indicum "indigo" (see indigo) + chemical name element -ium. So called for its spectral lines. Ferdinand Reich (1799-1882), professor of physics at Freiberg, isolated it while analyzing local zinc ores in 1863 and identified it as a new element by the two dark blue lines in its spectrum, which did not correspond to any known element. The discovery had to be observed by his assistant, Theodor Richter, because Reich was color-blind.
individual (adj.) Look up individual at Dictionary.com
early 15c., "one and indivisible, inseparable" (with reference to the Trinity), from Medieval Latin individualis, from Latin individuus "indivisible," from in- "not, opposite of" (see in- (1)) + dividuus "divisible," from dividere "divide" (see divide). Original sense now obsolete; the word was not common before c. 1600 and the 15c. example might be an outlier. Sense of "single, separate, of but one person or thing" is from 1610s; meaning "intended for one person" is from 1889.
individual (n.) Look up individual at Dictionary.com
"single object or thing," c. 1600, from individual (adj.). Meaning "a single human being" (as opposed to a group, etc.) is from 1640s. Colloquial sense of "person" is attested from 1742. Latin individuum as a noun meant "an atom, indivisible particle," and in Middle English individuum was used in sense of "individual member of a species" (early 15c.).
individualism (n.) Look up individualism at Dictionary.com
"quality of being distinct or individual, individuality," 1815, from individual + -ism. As the name of a social philosophy favoring non-interference of government in lives of individuals (opposed to communism and socialism) first attested 1851 in writings of J.S. Mill.
individualist (n.) Look up individualist at Dictionary.com
1839, "egoist, free-thinker," from individual + -ist, and compare individualism. Related: Individualistic.
individuality (n.) Look up individuality at Dictionary.com
1610s, "the aggregate of one's idiosyncrasies," from individual + -ity, or from Medieval Latin individualitas. Meaning "condition of existing as an individual" is from 1650s.
individualization (n.) Look up individualization at Dictionary.com
also individualisation, noun of action from individualize. Attested in 1746 but rare in English before 1820s, in which use probably it is a borrowing from French or German.
individualize (v.) Look up individualize at Dictionary.com
1630s, "to make individual, stamp with individual character;" 1650s, "to point out individually, to note separately as individuals;" see individual + -ize. Related: Individualized; individualizing.
individually (adv.) Look up individually at Dictionary.com
1590s, "indivisibly," from individual + -ly (2). Meaning "as individuals" is from 1640s.
individuate (v.) Look up individuate at Dictionary.com
1610s, from Medieval Latin individuatus, past participle of individuare "make individual," from Latin individuus "individual" (see individual (adj.)). Perhaps modeled on obsolete French individuer. Related: Individuated; individuating.
individuation (n.) Look up individuation at Dictionary.com
1620s, from Medieval Latin individuationem (nominative individuatio), noun of action from past participle stem of individuare "to make individual," from Latin individuus "individual" (see individual (adj.)). Psychological sense is from 1909.
indivisibility (n.) Look up indivisibility at Dictionary.com
1640s, from indivisible + -ity. Perhaps modeled on French indivisibilité.
indivisible (adj.) Look up indivisible at Dictionary.com
early 15c., from Old French indivisible (14c.) and directly from Late Latin indivisibilis "not divisible," from in- "not, opposite of" (see in- (1)) + divisibilis (see divisible). Related: Indivisibly.
Indo- Look up Indo- at Dictionary.com
word-forming element meaning "of or pertaining to India" (and some other place), from Greek Indo-, from Indos "India" (see India).
Indo-China Look up Indo-China at Dictionary.com
also Indochina, "Farther India, the region between India and China," 1815, from Indo- "India" + China. The name was said to have been proposed by Scottish poet and orientalist John Leyden, who lived and worked in India from 1803 till his death at 35 in 1811. French Indo-Chine is attested from 1813, but the source credits it to Leyden. The inappropriateness of the name was noticed from the start. Related: Indo-Chinese (1814).
Indo-European Look up Indo-European at Dictionary.com
1814, coined by English polymath Thomas Young (1773-1829) and first used in an article in the "Quarterly Review," from Indo- + European. "Common to India and Europe," specifically in reference to the group of related languages and to the race or races characterized by their use.

The alternative Indo-Germanic (1835) was coined in German in 1823 (indogermanisch), based on the two peoples then thought to be at the extremes of the geographic area covered by the languages, but this was before Celtic was realized also to be an Indo-European language. After this was proved, many German scholars switched to Indo-European as more accurate, but Indo-Germanic continued in use (popularized by the titles of major works) and the predominance of German scholarship in this field made it the popular term in England, too, through the 19c. See also Aryan. Indo-Aryan (1850) seems to have been used only of the Aryans of India. Indo-European also was used in reference to trade between Europe and India or European colonial enterprises in India (1813).
Indo-Germanic (adj.) Look up Indo-Germanic at Dictionary.com
1835, from German; see Indo-European.
Indo-Iranian (adj.) Look up Indo-Iranian at Dictionary.com
1838, from Indo- + Iranian.
Indo-Pacific (adj.) Look up Indo-Pacific at Dictionary.com
1851, in biology, from Indo- + Pacific.
indocile (adj.) Look up indocile at Dictionary.com
c. 1600, from French indocile (15c.) or directly from Latin indocilis, from in- "not, opposite of" (see in- (1)) + docilis (see docile).
indoctrinate (v.) Look up indoctrinate at Dictionary.com
formerly also endoctrinate, 1620s, "to teach," formed as if from Latin (but there seems to have been no word *indoctrinare), perhaps modeled on French endoctriner or extended from earlier (now obsolete) verb indoctrine, endoctrine, "to instruct" (mid-15c.); see in- (2) "in" + doctrine + -ate (2)). Meaning "to imbue with an idea or opinion" first recorded 1832. Related: Indoctrinated; indoctrinating.
indoctrination (n.) Look up indoctrination at Dictionary.com
1640s, "instruction," noun of action from indoctrinate. In reference to imbuing with opinions or ideology, from 1865.
indolence (n.) Look up indolence at Dictionary.com
c. 1600, "indifference to pain," from French indolence (16c.) or directly from Late Latin indolentia "freedom from pain, insensibility," abstract noun from Latin indolentem (nominative indolens) "insensitive to pain," from in- "not, opposite of, without" (see in- (1)) + dolentem (nominative dolens) "grieving," present participle of dolere "suffer pain, grieve" (see doleful). Originally of prisoners under torture, etc. The intermediate sense "state of rest or ease neither pleasant nor painful" (1650s) is now obsolete as well; main modern sense of "laziness, love of ease" (1710) perhaps reflects the notion of avoiding trouble (compare taking pains "working hard, striving (to do)").
The Castle hight of Indolence,
And its false Luxury;
Where for a little Time, alas!
We liv'd right jollity.

[Thomson, "The Castle of Indolence," 1748]
indolent (adj.) Look up indolent at Dictionary.com
1660s, "causing no pain, painless," from French indolent (16c.) or directly from Late Latin indolentem (see indolence). Sense of "living easily, slothful," is 1710, a sense perhaps developed in French. Related: Indolently.
indomitable (adj.) Look up indomitable at Dictionary.com
1630s, "that cannot be tamed or subdued," from Late Latin indomitabilis "untameable," from in- "not, opposite of, without" (see in- (1)) + *domitabilis, from Latin domitare, frequentative of domare "to tame" (see tame (adj.)). In reference to persons or personal qualities, "unyielding, persistent, resolute," by 1830. Related: Indomitably.
Indonesia Look up Indonesia at Dictionary.com
"the East Indies," 1850, from Indo- "India" + Greek nesos "island" (see Chersonese) + -ia. Formerly called Indian Archipelago or East Indies Islands (see Indies). Related: Indonesian "of or from the East Indies" (1850).
indoor (adj.) Look up indoor at Dictionary.com
also in-door, 1711, opposed to outdoor, contracted from within door; the form indoors is attested from 1759 (within-doors is from 1750); as an adverb from 1801.
indorse (v.) Look up indorse at Dictionary.com
see endorse. Indorser was old slang for "a sodomite" (1785).
indorsement (n.) Look up indorsement at Dictionary.com
see endorsement.
Indra Look up Indra at Dictionary.com
Vedic thunder god, from Sanskrit Indrah, a word of uncertain origin.
indrawn (adj.) Look up indrawn at Dictionary.com
also in-drawn, 1751, from in (adv.) + past tense of draw (v.). Middle English had indraw "bring about, cause" (late 14c.), "pull inward" (early 15c.). Also compare indraft "inward flow, a drawing in" (1590s). The modern verb indraw (1871) is rare and might be a back-formation.
indri (n.) Look up indri at Dictionary.com
1839, European name for the babakoto, a lemur-like arboreal primate of Madagascar (Indris Lichanotus); the common story since late 19c. is that the name was given in error by French naturalist Pierre Sonnerat (1748-1814), c. 1780, from mistaken use of Malagasy indry! "Look! See!" this being what his native guides said when they spotted the creature and called his attention to it.
However, as Hacking (1981) pointed out, Sonnerat was far too familiar with indris -- he described and figured them in detail, and apparently kept at least one in captivity -- for this story to be plausible. Furthermore, endrina is actually recorded as a native name for the indri (Cousins, 1885), and indri could easily be a variant of this name. Although the word endrina is first recorded in Malagasy only in 1835, there is no evidence that it could be a back-formation from the French indri (Hacking, 1981), and it seems implausible that the Malagasy would adopt an erroneous French name for an animal they were them selves familiar with. [Dunkel, Alexander R., et al., "Giant rabbits, marmosets, and British comedies: etymology of lemur names, part 1," in "Lemur News," vol. 16, 2011-2012, p.67]
indubious (adj.) Look up indubious at Dictionary.com
"certain, not doubtful," 1620s, from Latin indubius "not doubtful," from in- "not, opposite of" (see in- (1)) + dubius "vacillating, fluctuating," figuratively "wavering in opinion, doubting" (see dubious). Related: Indubiously.
indubitable (adj.) Look up indubitable at Dictionary.com
mid-15c., "too plain to admit of doubt," from Latin indubitabilis "that cannot be doubted," from in- "not, opposite of" (see in- (1)) + dubitabilis "doubtful," from dubitare "hesitate, doubt" (see doubt (v.)).
indubitably (adv.) Look up indubitably at Dictionary.com
"unquestionably, without a doubt," late 15c., from indubitable + -ly (2).
induce (v.) Look up induce at Dictionary.com
formerly also enduce, late 14c., "to lead by persuasions or other influences," from Latin inducere "lead into, bring in, introduce, conduct; persuade; suppose, imagine," from in- "into, in, on, upon" (see in- (2)) + ducere "to lead" (see duke (n.)). Meaning "to bring about" in any way (in reference to a trance, a fever, etc.) is from early 15c.; sense of "to infer by reasoning" is from 1560s. Electro-magnetic sense first recorded 1777. Related: Induced; inducing.
inducement (n.) Look up inducement at Dictionary.com
1590s, "that which induces," from induce + -ment.
inducive (adj.) Look up inducive at Dictionary.com
"tending to induce," 1610s, from induce + -ive.
induct (v.) Look up induct at Dictionary.com
late 14c., "introduce, initiate, especially into office or employment," from Latin inductus, past participle of inducere "to lead into, introduce" (see induce). Originally of church offices; sense of "draft into military service" is 1917 in American English. Related: Inducted; inducting.
inductance (n.) Look up inductance at Dictionary.com
1879, in electricity, from induct + -ance.
inductee (n.) Look up inductee at Dictionary.com
1941, American English, from induct + -ee.
induction (n.) Look up induction at Dictionary.com
late 14c., "advancement toward the grace of God;" also (c. 1400) "formal installation of a clergyman," from Old French induction (14c.) or directly from Latin inductionem (nominative inductio) "a leading in, introduction, admission," noun of action from past participle stem of inducere "to lead" (see induce).

As a term in logic (early 15c.) it is from Cicero's use of inductio to translate Greek epagoge "leading to" in Aristotle. Induction starts with known instances and arrives at generalizations; deduction starts from the general principle and arrives at some individual fact. As a term in physics, in reference to electrical influence, 1801; military service sense is from 1934, American English. Related: Inductional.
inductive (adj.) Look up inductive at Dictionary.com
early 15c., "bringing on, inducing," from Old French inductif or directly from Late Latin inductivus "serving to induce or infer," from induct-, past participle stem of Latin inducere (see induce). As a term in logic, "based on induction" (q.v.), from 1764. Related: Inductively.
inductor (n.) Look up inductor at Dictionary.com
1650s, "one who initiates," agent noun from Latin stem of induce. Classical Latin inductor meant "one who stirs up, an instigator." Electromagnetic senses are from 1837.
indulge (v.) Look up indulge at Dictionary.com
formerly also endulge, 1630s, "to grant as a favor;" 1650s, "to treat with unearned favor" (in reference both to persons and desires), a back-formation from indulgence (q.v.), or else from Latin indulgere "be complaisant, be indulgent, yield; give oneself up to;" probably a compound verb with first element in- "in," but the second element is obscure. Related: Indulged; indulging; indulgingly.
indulgence (n.) Look up indulgence at Dictionary.com
mid-14c., in the Church sense, "a freeing from temporal punishment for sin, remission from punishment for sin that remains due after absolution," from Old French indulgence or directly from Latin indulgentia "complaisance, a yielding; fondness, tenderness, affection; remission," from indulgentem (nominative indulgens) "indulgent, kind, tender, fond," present participle of indulgere "be kind; yield, concede, be complaisant; give oneself up to, be addicted," a word of uncertain origin; perhaps from in- "in" + a derivative of PIE root *dlegh- "to engage oneself," the source of play (v.) and plight (v.).

Sense of "leniency, forbearance of restraint or control of another, gratification of desire or humor" is attested from late 14c. That of "yielding to one's inclinations" (technically self-indulgence) in English is from 1630s. In British history, Indulgence also refers to grants of certain liberties to Nonconformists under Charles II and James II, as special favors rather than legal rights. The sale of indulgences in the original Church sense was done at times merely to raise money and was widely considered corrupt; the one in 1517 helped to spark the Protestant revolt in Germany.
indulgent (adj.) Look up indulgent at Dictionary.com
"lenient, willing to overlook faults," often in a bad sense, "too lenient," c. 1500, from Latin indulgentem (nominative indulgens) "kind, tender, fond," present participle of indulgere "be kind, be complaisant, yield" (see indulgence). Related: Indulgently.
indurate (v.) Look up indurate at Dictionary.com
1590s (transitive) "make hard;" 1620s (intransitive) "grow harder," from Latin induratus, past participle of indurare "to make hard, harden" (see endure). Related: Indurated.
indurate (adj.) Look up indurate at Dictionary.com
"hardened, made hard," early 15c., from Latin induratus, past participle of indurare "to make hard, harden" (see endure).