taciturn	adjective	temperamentally disinclined to talk
tangential	adjective	suddenly changeable
tassel	noun	a dangling ornament made by laying parallel a bunch of cords or threads of even length and fastening them at one end
taut	adjective	having no give or slack; tightly drawn; high-strung, tense
tautology	noun	needless repetition of an idea, statement, or word; an instance of tautology
tawdry	adjective	brassy; tastelessly showy
teetotal	adjective	of, relating to, or practicing teetotalism
temerity	noun	unreasonable or foolhardy contempt of danger or opposition; rashness, recklessness
tepid	adjective	moderately warm; lukewarm
timorous	adjective	of a timid disposition; fearful
torpid	adjective	having lost motion or the power of exertion or feeling; dormant, numb; sluggish in functioning or acting
tout	verb	to spy on; watch
transgress	verb	to violate a command or law; sin
transitory	adjective	tending to pass away; not persistent
trenchant	adjective	keen, sharp
trite	adjective	hackneyed or boring from much use; not fresh or original
truculent	adjective	feeling or displaying ferocity; cruel, savage
turbid	adjective	thick or opaque with or as if with roiled sediment; heavy with smoke or mist
turgid	adjective	excessively embellished in style or language; bombastic, pompous
tyro	noun	tiro beginner