threw
past tense of throw (q.v.).
thrice (adv.)
c.1200, from Old English þriga, þriwa "thrice" (from þrie "three;" see three) + adverbial genitive -es, changed c.1600 to -ce to reflect voiceless pronunciation.
thrift (n.)
c.1300, "fact or condition of thriving," also "prosperity, savings," from Middle English thriven "to thrive" (see thrive), influenced by (or from) Old Norse þrift, variant of þrif "prosperity," from þrifask "to thrive." Sense of "habit of saving, economy" first recorded 1550s (thrifty in this sense is recorded from 1520s; also see spendthrift). Thrift shop attested by 1919.
thrifty (adj.)
late 14c., "respectable," from thrift + -y (2). Meaning "frugal" is from 1520s. Related: Thriftily; thriftiness.
thrill (v.)
early 14c., "to pierce, penetrate," metathesis of Old English þyrlian "to perforate, pierce," from þyrel "hole" (in Middle English, also "nostril"), from þurh "through" (compare Middle High German dürchel "pierced, perforated;" see through) + -el. Meaning "give a shivering, exciting feeling" is first recorded 1590s, via metaphoric notion of "pierce with emotion." Related: Thrilled; thrilling.
thrill (n.)
"a shivering, exciting feeling," 1670s, from thrill (v.). Meaning "a thrilling experience" is attested from 1936.
thriller (n.)
1889, "sensational story," agent noun from thrill (v.).
thrive (v.)
c.1200, from a Scandinavian source akin to Old Norse þrifask "to thrive," originally "grasp to oneself," probably reflexive of þrifa "to clutch, grasp, grip, take hold of" (compare Norwegian triva "to seize," Swedish trifvas, Danish trives "to thrive, flourish"), of unknown origin. Related: Thrived (or throve); thriving.
thro (prep.)
shorter spelling of through.
throat (n.)
Old English þrote (implied in þrotbolla "the Adam's apple, larynx," literally "throat boll"), related to þrutian "to swell," from Proto-Germanic *thrut- (cognates: Old High German drozza, German Drossel, Old Saxon strota, Middle Dutch strote, Dutch strot "throat"), of uncertain origin. Italian strozza "throat," strozzare "to strangle" are Germanic loan-words. College slang for "competitive student" is 1970s, from cutthroat.
throaty (adj.)
1640s, from throat + -y (2). Related: Throatily; throatiness.
throb (v.)
late 14c., of uncertain origin, perhaps meant to represent in sound the pulsation of arteries and veins or the heart. Related: Throbbed; throbbing. The noun is first attested 1570s.
throe (n.)
c.1200, throwe "pain, pang of childbirth, agony of death," of uncertain origin, possibly from Old English þrawan "twist, turn, writhe" (see throw (v.)), or altered from Old English þrea (genitive þrawe) "affliction, pang, evil; threat, persecution" (related to þrowian "to suffer"), from Proto-Germanic *thrawo (cognates: Middle High German dro "threat," German drohen "to threaten"). Modern spelling first recorded 1610s. Related: Throes.
thrombo-
before vowels thromb-, word-forming element meaning "blood clot," from comb. form Greek thrombos "clot of blood" (see thrombus).
thrombophlebitis (n.)
1872, from thrombo- + phlebitis.
thrombosis (n.)
1706, Modern Latin, from Greek thrombosis "a clumping or curdling" (from thrombousthai "become curdled or clotted," from thrombos "clot, curd, lump;" see thrombus) + -osis.
thrombus (n.)
1690s, Modern Latin, from Greek thrombos "lump, piece, clot of blood, curd of milk."
throne (n.)
c.1200, trone, "the seat of God or a saint in heaven;" c.1300 as "seat occupied by a sovereign," from Old French trone (12c., Modern French trône), from Latin thronus, from Greek thronos "elevated seat, chair, throne," from PIE root *dher- (2) "to hold firmly, support" (cognates: Latin firmus "firm, steadfast, strong, stable," Sanskrit dharma "statute, law;" see firm (adj.)). From late 14c. as a symbol of royal power. Colloquial meaning "toilet" is recorded from 1922. The classical -h- begins to appear in English from late 14c.
throng (n.)
c.1300, probably shortened from Old English geþrang "crowd, tumult" (related to verb þringan "to push, crowd, press"), from Proto-Germanic *thrangan (cognates: Old Norse þröng, Dutch drang, German Drang "crowd, throng").
throng (v.)
"go in a crowd," 1530s, from throng (n.). Earlier it meant "to press, crush" (c.1400). Related: Thronged; thronging.
throstle (n.)
"thrush," Old English þrostle "thrush," from Proto-Germanic *thrust- (cognates: Old Saxon throsla, Old High German droscala, German Drossel "thrush"), altered from (perhaps a diminutive of) *thurstaz (see thrush (n.1)).
throttle (v.)
"strangle to death," c.1400, probably from Middle English throte "throat" (see throat) + -le, perhaps a frequentive suffix (as in spark/sparkle), or a utensil suffix (as in handle), or simply to distinguish it from throat (v.), which in late 14c. was used to mean "cut the throat of, kill by cutting the throat." Related: Throttled; throttling.
throttle (n.)
1540s, "throat;" it appears to be an independent formation from throat, perhaps a diminutive form, not derived directly from the verb. The mechanical sense is first recorded 1872, short for throttle-valve (1824). Full-throttle (allowing maximum speed) is from 1848 in reference to steam engines.
through (prep., adv.)
late 14c., metathesis of Old English þurh, from Proto-Germanic *thurkh (cognates: Old Saxon thuru, Old Frisian thruch, Middle Dutch dore, Dutch door, Old High German thuruh, German durch, Gothic þairh "through"), from PIE root *tere- (2) "to cross over, pass through, overcome" (cognates: Sanskrit tirah, Avestan taro "through, beyond," Latin trans "beyond," Old Irish tre, Welsh tra "through"). Not clearly differentiated from thorough until early Modern English. Spelling thro was common 15c.-18c. Reformed spelling thru (1839) is mainly American English.
throughly (adv.)
"fully, completely," mid-15c., from through + -ly (2). Archaic alternative to thoroughly.
throughout (prep.)
late Old English þurhut; see through + out (adv.). Similar formation in German durchaus.
throughput (n.)
"energy, activity," 1808, Scottish slang; from through + put. Industrial sense is from 1915.
throughway (n.)
"expressway, large toll road," 1934, American English, from through + way (n.).
throve
sometime past tense of thrive (v.).
throw (v.)
"to project, propel," c.1300, from Old English þrawan "to twist, turn, writhe, curl," (past tense þreow, past participle þrawen), from Proto-Germanic *threw- (cognates: Old Saxon thraian, Middle Dutch dræyen, Dutch draaien, Old High German draen, German drehen "to turn, twist;" not found in Scandinavian or Gothic), from PIE *tere- (1) "to rub, turn, rub by turning, bore" (cognates: Sanskrit turah "wounded, hurt," Greek teirein "to rub, rub away," Latin terere "to rub, thresh, grind, wear away," Old Church Slavonic tiro "to rub," Lithuanian trinu "to rub," Old Irish tarathar "borer," Welsh taraw "to strike").

Not the usual Old English word for "to throw" (weorpan, related to warp (v.) was common in this sense). The sense evolution may be via the notion of whirling a missile before throwing it. The sense of "put by force" (as in throw in jail) is first recorded 1550s; that of "confuse, flabbergast" is from 1844; that of "lose deliberately" is from 1868.

To throw the book at (someone) is 1932, from notion of judge sentencing a criminal from a law book full of possible punishments. To throw (one's) hat in the ring "issue a challenge," especially to announce one's candidacy, first recorded 1917. To throw up "vomit" is first recorded 1732. To throw (someone) off "confuse by a false scent" is from 1891.
throw (n.)
"act of throwing," 1520s, from throw (v.). Wrestling sense is first attested 1819.
throwaway (adj.)
also throw-away, 1901 in reference to very low prices; by 1903 in reference to printed material meant to be read once then tossed, and to wasted votes; with reference to disposable consumer goods, attested from 1969. From the verbal phrase, attested from late 14c. in the sense "reject, cast from oneself," from throw (v.) + away (adv.). More literal meaning of "dispose of as useless, release from one's possession as unneeded" is first recorded 1520s. Throw-away society attested from 1967.
throwback (n.)
also throw-back, "reversion to an ancestral type or character," 1888, from throw (v.) + back (adv.); earlier it meant "a reverse in a course or progress, a relapse" (1856).
thrown
past participle of throw (v.).
thru (prep.)
by 1839, altered spelling of through; at first often in representations of dialect (Scottish, Yankee), by 1880s in standard use as a simplified spelling.
thrum (v.)
"play a stringed instrument," 1590s, from the noun (1550s), of imitative origin. Related: Thrummed; thrumming.
thruout
contraction of throughout.
thrush (n.1)
type of songbird, Old English þræsce, variant of þrysce, from Proto-Germanic *thruskjon (cognates: Old Norse þröstr, Norwegian trost, Old High German drosca), from PIE *trozdo- (cognates: Latin turdus, Lithuainian strazdas "thrush," Middle Irish truid, Welsh drudwy "starling," Old Church Slavonic drozgu, Russian drozdu).
thrush (n.2)
throat disease, 1660s, probably from a Scandinavian source (such as Norwegian, Danish trøske, Swedish torsk), but its roots and original meaning are unclear.
thrust (v.)
late 12c., from a Scandinavian source akin to Old Norse þrysta "to thrust, force, press," from Proto-Germanic *thrustijanan, perhaps from PIE *treud- "push, press" (see threat), but OED finds this derivation doubtful. Related: Thrusting.
thrust (n.)
1510s, "act of pressing," from thrust (v.). Meaning "act of thrusting" (in the modern sense) is from 1580s. Meaning "propulsive force" is from 1708. Figurative sense of "principal theme, aim, point, purpose" is recorded from 1968.
thruster (n.)
type of rocket engine, 1962, agent noun; see thrust (n.).
thud (v.)
Old English þyddan "to strike, stab, thrust, press," of imitative origin. Sense of "hit with a dull sound" first recorded 1796. Related: Thudded; thudding. The noun is attested from 1510s as "blast of wind;" 1530s as "loud sound."
thug (n.)
1810, "member of a gang of murderers and robbers in India who strangled their victims," from Marathi thag, thak "cheat, swindler," Hindi thag, perhaps from Sanskrit sthaga-s "cunning, fraudulent," from sthagayati "(he) covers, conceals," perhaps from PIE root *(s)teg- (2) "to cover" (see stegosaurus).
The thugs roamed about the country in bands of from 10 to 100, usually in the disguise of peddlers or pilgrims, gaining the confidence of other travelers, whom they strangled, when a favorable opportunity presented itself, with a handkerchief, an unwound turban, or a noosed cord. The shedding of blood was seldom resorted to. The motive of the thugs was not so much lust of plunder as a certain religious fanaticism. The bodies of their victims were hidden in graves dug with a consecrated pickax, and of their spoil one third was devoted to the goddess Kali, whom they worshiped. [Century Dictionary]
The more correct Indian name is phanseegur (from phansi "noose"), and the activity was described in English as far back as c.1665. Rigorously prosecuted by the British from 1831, they were driven from existence by century's end. Transferred sense of "ruffian, cutthroat, violent lowbrow" is from 1839.
thuggery (n.)
1839, from thug + -ery. Also thugee, from the native Hindi name for the system of religious assassination practiced by the thugs.
thuggish (adj.)
"ruffianly, brutal and forceful," 1870, from thug + -ish. Related: Thuggishly; thuggishness.
Thule
region or island at northernmost part of the world, Old English, from Latin, from Greek Thyle "land six days' sail north of Britain" (Strabo, quoting a lost portion of a work by Polybius, itself based on a lost account of a voyage to the north by 4c. B.C.E. geographer Pytheas). The identity of the place and the source of the name have sparked much speculation; Polybius doubted the whole thing, and since Roman times the name has been used in a transferred sense of "extreme limits of travel" (Ultima Thule).
The barbarians showed us where the sun set. For it happened in those places that the night was extremely short, lasting only two or three hours; and the sun sunk under the horizon, after a short interval reappeared at his rising." [Pytheas]
The name was given to a trading post in Greenland in 1910, site of a U.S. air base in World War II.
thulium (n.)
1879, Modern Latin, from thulia (thulite), name of an earth found in Scandinavia, from which the element was identified in 1879 by Swedish geologist Per Tedor Cleve (1840-1905), from Thule, which sometimes was identified as Scandinavia.
thumb (n.)
Old English þuma, from Proto-Germanic *thumon- (cognates: Old Frisian thuma, Old Saxon, Old High German thumo, German Daumen, Dutch duim "thumb," Old Norse þumall "thumb of a glove"), literally "the stout or thick (finger)," from PIE *tum- "swell," from root *teue- (2) "to swell" (see thigh). For spelling with -b (attested from late 13c.), see limb.

To be under (someone's) thumb "be totally controlled by that person" is recorded from 1580s. Thumbs up (1887) and thumbs down (1906) were said to be from expressions of approval or the opposite in ancient amphitheaters, especially gladiator shows, where the gesture decided whether a defeated combatant was spared or slain. But the Roman gesture was merely one of hiding the thumb in the hand or extending it. Perhaps the modern gesture is from the usual coachmen's way of greeting while the hands are occupied with the reins.
thumb (v.)
"to go through" (especially of printed material), 1930, from thumb (n.), though the related sense of "soil or wear by handling" dates from 1640s. Earlier as a verb it meant "to play (a musical instrument) with the thumb" (1590s). Meaning "to hitchhike" is 1939; originally the thumb pointed in the direction one wished to travel. Related: Thumbed; thumbing. To thumb (one's) nose as an expression of derision is recorded from 1903.