| tremulous | (adjective) (of the voice) quivering as from weakness or fear | Synonyms: quavering |
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| tremulously | (adverb) in a tremulous manner | - |
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| trenail | (noun) a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast | Synonyms: treenail, trunnel |
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| trench | (noun) a ditch dug as a fortification having a parapet of the excavated earth | - |
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| (noun) any long ditch cut in the ground | - |
| (noun) a long steep-sided depression in the ocean floor | Synonyms: deep, oceanic abyss |
| (verb) cut or carve deeply into | - |
| (verb) dig a trench or trenches | - |
| (verb) cut a trench in, as for drainage | Synonyms: ditch |
| (verb) fortify by surrounding with trenches | - |
| (verb) set, plant, or bury in a trench | - |
| (verb) impinge or infringe upon | Synonyms: encroach, entrench, impinge |
| trenchancy | (noun) keenness and forcefulness of thought or expression or intellect | Synonyms: incisiveness |
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| trenchant | (adjective) clearly or sharply defined to the mind | Synonyms: clear-cut, distinct |
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| (adjective) characterized by or full of force and vigor | Synonyms: hard-hitting |
| (adjective) having keenness and forcefulness and penetration in thought, expression, or intellect | Synonyms: searching |
| trenchantly | (adverb) in a vigorous and effective manner | - |
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| trencher | (noun) a wooden board or platter on which food is served or carved | - |
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| (noun) someone who digs trenches | - |
| trencherman | (noun) a person who is devoted to eating and drinking to excess | Synonyms: glutton, gourmand, gourmandizer |
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| trend | (noun) a general tendency to change (as of opinion) | Synonyms: drift, movement |
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| (noun) the popular taste at a given time | Synonyms: style, vogue |
| (noun) general line of orientation | Synonyms: course |
| (noun) a general direction in which something tends to move | Synonyms: tendency |
| (verb) turn sharply; change direction abruptly | Synonyms: curve, cut, sheer, slew, slue, swerve, veer |
| (verb) to be temporarily popular | - |
| trendsetting | (adjective) initiating or popularizing a trend | Synonyms: trend-setting |
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| trendy | (adjective) in accord with the latest fad | Synonyms: voguish |
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| trepan | (noun) a drill for cutting circular holes around a center | - |
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| (noun) a surgical instrument used to remove sections of bone from the skull | Synonyms: trephine |
| (verb) cut a hole with a trepan, as in surgery | - |
| trepang | (noun) of warm coasts from Australia to Asia; used as food especially by Chinese | Synonyms: Holothuria edulis |
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| trephination | (noun) an operation that removes a circular section of bone from the skull | - |
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| trephine | (noun) a surgical instrument used to remove sections of bone from the skull | Synonyms: trepan |
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| (verb) operate on with a trephine | - |
| trepid | (adjective) timid by nature or revealing timidity | Synonyms: fearful, timorous |
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| trepidation | (noun) a feeling of alarm or dread | - |
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| trepidly | (adverb) in a timorous and trepid manner | Synonyms: timorously |
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| treponema | (noun) spirochete that causes disease in humans (e.g. syphilis and yaws) | - |
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| trespass | (noun) entry to another's property without right or permission | Synonyms: encroachment, intrusion, usurpation, violation |
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| (noun) a wrongful interference with the possession of property (personal property as well as realty), or the action instituted to recover damages | - |
| (verb) pass beyond (limits or boundaries) | Synonyms: overstep, transgress |
| (verb) break the law | - |
| (verb) enter unlawfully on someone's property | Synonyms: intrude |
| (verb) commit a sin; violate a law of God or a moral law | Synonyms: sin, transgress |
| (verb) make excessive use of | Synonyms: take advantage |
| trespasser | (noun) someone who intrudes on the privacy or property of another without permission | Synonyms: interloper, intruder |
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| trespassing | (adjective) gradually intrusive without right or permission | Synonyms: encroaching, invasive |
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| tress | (noun) a hairdo formed by braiding or twisting the hair | Synonyms: braid, plait, twist |
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| trestle | (noun) sawhorses used in pairs to support a horizontal tabletop | - |
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| (noun) a supporting tower used to support a bridge | - |
| trestlework | (noun) a supporting structure composed of a system of connected trestles; for a bridge or pier or scaffold e.g. | - |
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| trews | (noun) (used in the plural) tight-fitting trousers; usually of tartan | - |
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| trey | (noun) one of four playing cards in a deck having three pips | Synonyms: three |
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| (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, triad, trine, trinity, trio, triplet, troika |
| triacetate | (noun) cellulose acetate that is relatively slow to burn; used instead of celluloid for motion-picture film | Synonyms: cellulose triacetate |
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| triad | (noun) a three-note major or minor chord; a note and its third and fifth tones | Synonyms: common chord |
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| (noun) three people considered as a unit | Synonyms: threesome, trinity, trio |
| (noun) a set of three similar things considered as a unit | Synonyms: trio, triple, triplet |
| (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, trine, trinity, trio, triplet, troika |
| triage | (noun) sorting and allocating aid on the basis of need for or likely benefit from medical treatment or food | - |
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| trial | (noun) the act of testing something | Synonyms: run, test |
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| (noun) (law) the determination of a person's innocence or guilt by due process of law | - |
| (noun) the act of undergoing testing | Synonyms: test |
| (noun) trying something to find out about it | Synonyms: test, trial run, tryout |
| (noun) an annoying or frustrating or catastrophic event | Synonyms: tribulation, visitation |
| (noun) (sports) a preliminary competition to determine qualifications | - |
| triamcinolone | (noun) a synthetic corticosteroid (trade names Aristocort or Aristopak or Kenalog) used as an anti-inflammatory agent | Synonyms: Aristocort, Aristopak, Kenalog |
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| triangle | (noun) a percussion instrument consisting of a metal bar bent in the shape of an open triangle | - |
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| (noun) any of various triangular drafting instruments used to draw straight lines at specified angles | - |
| (noun) a three-sided polygon | Synonyms: trigon, trilateral |
| (noun) something approximating the shape of a triangle | - |
| triangular | (adjective) having three angles; forming or shaped like a triangle | - |
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| (adjective) having three sides | Synonyms: three-sided, trilateral |
| triangularity | (noun) the property of being shaped like a triangle | - |
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| triangulate | (adjective) composed of or marked with triangles | - |
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| (verb) survey by triangulation | - |
| (verb) measure by using trigonometry | - |
| (verb) divide into triangles or give a triangular form to | - |
| triangulation | (noun) a method of surveying; the area is divided into triangles and the length of one side and its angles with the other two are measured, then the lengths of the other sides can be calculated | - |
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| (noun) a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points of a known distance apart; useful in navigation | - |
| triazine | (noun) any of three isomeric compounds having three carbon and three nitrogen atoms in a six-membered ring | - |
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| triazolam | (noun) a form of benzodiazepine (trade name Halcion) frequently prescribed as a sleeping pill; usually given to people who have trouble falling asleep | Synonyms: Halcion |
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| tribade | (noun) a female homosexual | Synonyms: gay woman, lesbian |
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| tribadism | (noun) a form of lesbianism that simulates heterosexual intercourse | - |
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| tribadistic | (adjective) of female homosexual behavior that attempts to simulate heterosexual behavior | - |
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| tribal | (adjective) relating to or characteristic of a tribe | - |
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| tribalisation | (noun) the act of making tribal; unification on a tribal basis | Synonyms: tribalization |
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| tribalism | (noun) the beliefs of a tribal society | - |
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| (noun) the state of living together in tribes | - |
| tribalization | (noun) the act of making tribal; unification on a tribal basis | Synonyms: tribalisation |
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| tribe | (noun) a social division of (usually preliterate) people | Synonyms: folk |
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| (noun) a federation (as of American Indians) | Synonyms: federation of tribes |
| (noun) group of people related by blood or marriage | Synonyms: clan, kin, kin group, kindred, kinship group |
| (noun) (biology) a taxonomic category between a genus and a subfamily | - |
| tribesman | (noun) someone who lives in a tribe | - |
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| tribologist | (noun) a specialist in tribology | - |
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| tribology | (noun) the branch of engineering that deals with the interaction of surfaces in relative motion (as in bearings or gears): their design and friction and wear and lubrication | - |
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| tribromoethanol | (noun) an intravenous anesthetic | Synonyms: tribromoethyl alcohol |
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| tribromomethane | (noun) colorless liquid haloform CHBr3 | Synonyms: bromoform |
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| tribulate | (verb) oppress or trouble greatly | - |
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| tribulation | (noun) an annoying or frustrating or catastrophic event | Synonyms: trial, visitation |
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| tribunal | (noun) an assembly (including one or more judges) to conduct judicial business | Synonyms: court, judicature |
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| tribune | (noun) the apse of a Christian church that contains the bishop's throne | - |
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| (noun) (ancient Rome) an official elected by the plebeians to protect their interests | - |
| tribuneship | (noun) the position of tribune | - |
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| tributary | (adjective) tending to bring about; being partly responsible for | Synonyms: conducive, contributing, contributive, contributory |
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| (adjective) paying tribute | - |
| (adjective) (of a stream) flowing into a larger stream | - |
| (noun) a branch that flows into the main stream | Synonyms: affluent, confluent, feeder |
| tribute | (noun) payment by one nation for protection by another | - |
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| (noun) payment extorted by gangsters on threat of violence | Synonyms: protection |
| (noun) something given or done as an expression of esteem | Synonyms: testimonial |
| tributyrin | (noun) a bitter oily triglyceride of butyric acid; a form of butyrin | - |
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| trice | (noun) a very short time (as the time it takes the eye to blink or the heart to beat) | Synonyms: blink of an eye, flash, heartbeat, instant, jiffy, New York minute, split second, twinkling, wink |
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| (verb) hoist up or in and lash or secure with a small rope | Synonyms: trice up |
| (verb) raise with a line | Synonyms: trice up |
| tricentenary | (adjective) of or relating to or completing a period of 300 years | Synonyms: tricentennial |
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| tricentennial | (adjective) of or relating to or completing a period of 300 years | Synonyms: tricentenary |
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| triceps | (noun) any skeletal muscle having three origins (but especially the triceps brachii) | - |
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| triceratops | (noun) huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill | - |
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| trichina | (noun) parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles | Synonyms: Trichinella spiralis |
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| trichiniasis | (noun) infestation by trichina larvae that are transmitted by eating inadequately cooked meat (especially pork); larvae migrate from the intestinal tract to the muscles where they become encysted | Synonyms: myositis trichinosa, trichinosis |
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| trichinosis | (noun) infestation by trichina larvae that are transmitted by eating inadequately cooked meat (especially pork); larvae migrate from the intestinal tract to the muscles where they become encysted | Synonyms: myositis trichinosa, trichiniasis |
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| trichion | (noun) point where the hairline meets the midpoint of the forehead | Synonyms: crinion |
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| trichloride | (noun) any compound containing three chlorine atoms in each molecule | - |
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| trichlormethiazide | (noun) diuretic drug (trade name Naqua) used to treat hypertension | Synonyms: Naqua |
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| trichloroethane | (noun) a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage | Synonyms: TCE, trichloroethylene |
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| trichloroethylene | (noun) a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage | Synonyms: TCE, trichloroethane |
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| trichloromethane | (noun) a volatile liquid haloform (CHCl3); formerly used as an anesthetic | Synonyms: chloroform |
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| trichobezoar | (noun) a compact mass of hair that forms in the alimentary canal (especially in the stomach of animals as a result of licking fur) | Synonyms: hair ball, hairball |
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| trichodesmium | (noun) large colonial bacterium common in tropical open-ocean waters; important in carbon and nitrogen fixation | - |
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| trichomonad | (noun) cause of trichomoniasis in women and cattle and birds | - |
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| trichomoniasis | (noun) infection of the vagina | - |
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| trichopteran | (noun) caddis fly | Synonyms: trichopteron, trichopterous insect |
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| trichopteron | (noun) caddis fly | Synonyms: trichopteran, trichopterous insect |
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| trichotillomania | (noun) an irresistible urge to pull out your own hair | - |
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| trichotomy | (noun) being threefold; a classification into three parts or subclasses | - |
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| trichroism | (noun) pleochroism of a crystal so that it exhibits three different colors when viewed from three different directions | - |
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| trichromacy | (noun) the normal ability to see colors | Synonyms: chromatic vision, color vision |
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| trichromatic | (adjective) having or involving three colors | Synonyms: trichrome, tricolor |
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| trichrome | (adjective) having or involving three colors | Synonyms: trichromatic, tricolor |
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| trichuriasis | (noun) infestation by a roundworm; common in tropical areas with poor sanitation | - |
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| trick | (noun) a ludicrous or grotesque act done for fun and amusement | Synonyms: antic, caper, joke, prank, put-on |
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| (noun) (card games) in a single round, the sequence of cards played by all the players; the high card is the winner | - |
| (noun) an illusory feat; considered magical by naive observers | Synonyms: conjuration, conjuring trick, deception, illusion, legerdemain, magic, magic trick, thaumaturgy |
| (noun) an attempt to get you to do something foolish or imprudent | - |
| (noun) a cunning or deceitful action or device | Synonyms: fast one |
| (noun) a prostitute's customer | Synonyms: john, whoremaster, whoremonger |
| (noun) a period of work or duty | - |
| (verb) deceive somebody | Synonyms: flim-flam, fob, fox, play a joke on, play a trick on, play tricks, pull a fast one on |
| tricker | (noun) someone who plays practical jokes on others | Synonyms: cut-up, hoaxer, practical joker, prankster, trickster |
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| trickery | (noun) the use of tricks to deceive someone (usually to extract money from them) | Synonyms: chicane, chicanery, guile, shenanigan, wile |
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| (noun) verbal misrepresentation intended to take advantage of you in some way | Synonyms: hanky panky, hocus-pocus, jiggery-pokery, skulduggery, skullduggery, slickness |
| trickily | (adverb) in an subtle, cunning manner | Synonyms: artfully, craftily, cunningly, foxily, knavishly, slyly |
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| trickiness | (noun) the quality of being a slippery rascal | Synonyms: rascality, shiftiness, slipperiness |
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| (noun) the quality of requiring skill or caution | - |
| trickle | (noun) flowing in drops; the formation and falling of drops of liquid | Synonyms: dribble, drip |
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| (verb) run or flow slowly, as in drops or in an unsteady stream | Synonyms: dribble, filter |
| trickster | (noun) someone who plays practical jokes on others | Synonyms: cut-up, hoaxer, practical joker, prankster, tricker |
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| (noun) someone who leads you to believe something that is not true | Synonyms: beguiler, cheat, cheater, deceiver, slicker |
| (noun) a mischievous supernatural being found in the folklore of many primitive people; sometimes distinguished by prodigious biological drives and exaggerated bodily parts | - |
| tricksy | (adjective) marked by skill in deception | Synonyms: crafty, cunning, dodgy, foxy, guileful, knavish, slick, sly, tricky, wily |
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| tricky | (adjective) marked by skill in deception | Synonyms: crafty, cunning, dodgy, foxy, guileful, knavish, slick, sly, tricksy, wily |
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| (adjective) having concealed difficulty | Synonyms: catchy |
| (adjective) not to be trusted | Synonyms: slippery |
| triclinic | (adjective) having three unequal crystal axes intersecting at oblique angles | Synonyms: anorthic |
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| triclinium | (noun) a dining table with couches along three sides in ancient Rome | - |
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| (noun) a dining room (especially a dining room containing a dining table with couches along three sides) | - |
| tricolor | (adjective) having or involving three colors | Synonyms: trichromatic, trichrome |
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| (noun) a flag having three colored stripes (especially the French flag) | Synonyms: tricolour |