ineffable (adj.) Look up ineffable at
late 14c., from Old French ineffable (14c.) or directly from Latin ineffabilis "unutterable," from in- "not, opposite of" (see in- (1)) + effabilis "speakable," from effari "utter," from ex- "out" (see ex-) + fari "to say, speak," from PIE root *bha- (2) "to speak, tell, say" (see fame (n.)). Plural noun ineffables was, for a time, a jocular euphemism for "trousers" (1823). Related: Ineffably.
ineffective (adj.) Look up ineffective at
1650s, from in- (1) "not, opposite of" + effective. Related: Ineffectively; ineffectiveness.
ineffectual (adj.) Look up ineffectual at
early 15c., from in- (1) "not, opposite of" + effectual. Related: Ineffectually; ineffectuality.
inefficacious (adj.) Look up inefficacious at
1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).
inefficacy (n.) Look up inefficacy at
"want of force or virtue to produce the desired effect," 1610s, from Late Latin inefficacia, from inefficacem (nominative inefficax), from in- "not, opposite of" (see in- (1)) + efficax (see efficacy).
inefficient (adj.) Look up inefficient at
1750, "not producing the desired effect," from in- (1) "not, opposite of" + efficient. Related: Inefficiency (1749); inefficiently.
inelastic (adj.) Look up inelastic at
1748, from in- (1) "not, opposite of" + elastic. Figurative use attested by 1867.
inelegant (adj.) Look up inelegant at
c. 1500, from French inélégant (15c.), from Latin inelegantem (nominative inelegans) "not choice, without taste, without judgment," from in- "not" (see in- (1)) + elegans (see elegant). Related: Inelegantly; inelegance.
ineligible (adj.) Look up ineligible at
1770, from in- (1) "not, opposite of" + eligible.
ineluctable (adj.) Look up ineluctable at
"not to be escaped by struggling," 1620s, from Latin ineluctabilis "unavoidable, inevitable," from in- "not, opposite of" (see in- (1)) + eluctari "to struggle out of," from ex- "out" (see ex-) + luctari "to struggle" (see reluctance).
inept (adj.) Look up inept at
c. 1600, from Old French inepte (14c.) or directly from Latin ineptus "unsuitable, improper, absurd, awkward, silly, tactless," from in- "not, opposite of" (see in- (1)) + aptus "apt" (see apt). Related: Ineptly; ineptness.
ineptitude (n.) Look up ineptitude at
1610s, from French ineptitude, from Latin ineptitudo, noun of quality from ineptus "unsuitable, absurd" (see inept).
inequable (adj.) Look up inequable at
1717, from Latin inaequabilis "uneven," from in- "not" (see in- (1)) + aequabilis (see equable).
inequality (n.) Look up inequality at
early 15c., "difference of rank or dignity," from Old French inequalité (14c.) and directly from Medieval Latin inaequalitas, from Latin inaequalis "unequal," from in- "not, opposite of" (see in- (1)) + aequalis "equal" (see equal).
inequitable (adj.) Look up inequitable at
1660s, from in- (1) "not, opposite of" + equitable. Related: Inequitably.
inequity (n.) Look up inequity at
1550s, from in- (1) "not, opposite of" + equity. Formed from the same elements as iniquity, but natively. Related: Inequities.
ineradicable (adj.) Look up ineradicable at
1794, from in- (1) "not, opposite of" + eradicable (see eradicate). Related: Ineradicably.
inerrancy (n.) Look up inerrancy at
1818, from inerrant + -cy.
inerrant (adj.) Look up inerrant at
1650s, in reference to "fixed" stars (as opposed to "wandering" planets), from Latin inerrantem (nominative inerrans) "not wandering," from in- "not, opposite of" (see in- (1)) + errans, present participle of errare "to err" (see err).
inert (adj.) Look up inert at
1640s, from French inerte (16c.) or directly from Latin inertem (nominative iners) "unskilled, inactive, helpless, sluggish, worthless," from in- "without" + ars (genitive artis) "skill" (see art (n.)). Originally of matter; specifically of gases from 1885. Of persons or creatures, from 1774.
inertia (n.) Look up inertia at
1713, introduced as a term in physics 17c. by German astronomer and physician Johann Kepler (1571-1630), from Latin inertia "unskillfulness, idleness," from iners (genitive inertis) "unskilled, inactive;" see inert. Used in Modern Latin by Newton (1687). Sense of "apathy" first recorded 1822.
inertial (adj.) Look up inertial at
1737, from inertia + -al (1).
inertness (n.) Look up inertness at
1660s, from inert + -ness.
inescapable (adj.) Look up inescapable at
1792, from in- (1) "not, opposite of" + escapable (see escape). Related: Inescapably.
inestimable (adj.) Look up inestimable at
late 14c., "beyond estimation," from Old French inestimable (14c.) or directly from Latin inaestimabilis, from in- "not, opposite of" (see in- (1)) + aestimabilis (see estimable). Meaning "too precious to set a value on, priceless" is attested by 1570s. Related: Inestimably.
inevitability (n.) Look up inevitability at
1640s, from inevitable + -ity.
inevitable (adj.) Look up inevitable at
mid-15c., from Latin inevitabilis "unavoidable," from in- "not, opposite of" (see in- (1)) + evitabilis "avoidable," from evitare "to avoid," from ex- "out" (see ex-) + vitare "shun," originally "go out of the way."
inevitably (adv.) Look up inevitably at
mid-15c., from inevitable + -ly (2).
inexact (adj.) Look up inexact at
1828, from in- (1) "not, opposite of" + exact. Related: Inexactly.
inexactitude (n.) Look up inexactitude at
1786, from in- (1) "not, opposite of" + exactitude.
inexcusable (adj.) Look up inexcusable at
early 15c., from Latin inexcusabilis, from in- "not, opposite of" (see in- (1)) + excusabilis, from excusare (see excuse). Related: Inexcusably.
inexhaustible (adj.) Look up inexhaustible at
c. 1600, from in- (1) "not, opposite of" + exhaustible (see exhaust). Related: Inexhaustibly.
inexorable (adj.) Look up inexorable at
1550s, from Middle French inexorable and directly from Latin inexorabilis "that cannot be moved by entreaty," from in- "not, opposite of" (see in- (1)) + exorabilis "able to be entreated," from exorare "to prevail upon," from ex- "out" (see ex-) + orare "pray" (see orator). Related: Inexorably; inexorability.
inexpedient (adj.) Look up inexpedient at
c. 1600, from in- (1) "not, opposite of" + expedient. Related: Inexpedience; inexpediently.
inexpensive (adj.) Look up inexpensive at
1837 (implied in inexpensively), from in- (1) "not, opposite of" + expensive.
inexperience (n.) Look up inexperience at
1590s, from French inexpérience (mid-15c.), from Late Latin inexperientia, from in- "not, opposite of" (see in- (1)) + experientia (see experience).
inexperienced (adj.) Look up inexperienced at
1620s, adjective from inexperience.
inexpert (adj.) Look up inexpert at
mid-15c., from in- (1) "not, opposite of" + expert (adj.), or else from Old French inexpert, from Latin inexpertus "without experience, unpracticed." Related: Inexpertly.
inexpiable (adj.) Look up inexpiable at
1560s, from Latin inexpiabilis "that cannot be atoned for," from in- "not" (see in- (1)) + expiabilis, from expiare (see expiation).
inexplicable (adj.) Look up inexplicable at
early 15c., from Middle French inexplicable or directly from Latin inexplicabilis "that cannot be unfolded or disentangled, very intricate," figuratively, "inexplicable," from in- "not, opposite of" (see in- (1)) + explicabilis "that may be explained" (see explicable). Related: Inexplicably.
inexplicit (adj.) Look up inexplicit at
1775 (implied in inexplicitly), from in- (1) "not, opposite of" + explicit. Or else from Latin inexplicitus "not to be unfolded; unexplained." Related: Inexplicitly; inexplicitness.
inexpressible (adj.) Look up inexpressible at
1620s, from in- (1) "not" + expressible (see express (v.)). Related: Inexpressibly.
inexpugnable (adj.) Look up inexpugnable at
late 15c., from Latin inexpugnabilis "not to be taken by assault," from in- "not" (see in- (1) + expuglabilis, from expugnare (see expugn).
inextinguishable (adj.) Look up inextinguishable at
c. 1500, from in- (2) "not" + extinguishable (see extinguish). Related: Inextinguishably; inextinguishability.
inextricable (adj.) Look up inextricable at
early 15c., from Latin inextricabilis "that cannot be disentangled," from in- "not, opposite of" (see in- (1)) + extricare (see extricate). Related: Inextricably.
Inez Look up Inez at
fem. proper name, Spanish form of Agnes (q.v.).
infallibility (n.) Look up infallibility at
1610s, from Medieval Latin infallibilitas, from infallibilis (see infallible).
infallible (adj.) Look up infallible at
early 15c., from Medieval Latin infallibilis, from in- "not, opposite of" (see in- (1)) + Late Latin fallibilis (see fallible). In reference to Popes, attested from 1870. Related: Infallibly.
infamous (adj.) Look up infamous at
"of ill repute," late 14c., from Medieval Latin infamosus, from Latin in- "not, opposite of" (see in- (1)) + famosus "celebrated" (see famous). Meaning influenced by Latin infamis "of ill fame" (see infamy). As a legal term, "disqualified from certain rights of citizens in consequence of conviction of certain crimes" (late 14c.). The neutral fameless is recorded from 1590s. Related: Infamously.
infamy (n.) Look up infamy at
early 15c., from Old French infamie (14c.), earlier infame, and directly from Latin infamia "ill fame, bad repute, dishonor, from infamis "of ill fame," from in- "not, without" + fama "reputation" (see fame (n.)).