T

tautology - noun useless repetition; (logic) a statement that is necessarily true
tendentious - adj. having or marked by a strong tendency especially a controversial one
touchstone - noun a basis for comparison; a reference point against which other things can be evaluated
traumatic - adj. psychologically painful; "few experiences are more traumatic than losing a child"; of or relating to a physical injury or wound to the body
truckle - noun a low bed to be slid under a higher bed; verb yield to out of weakness; try to gain favor by cringing or flattering
truncate - adj. terminating abruptly by having or as if having an end or point cut off; verb make shorter as if by cutting off; approximate by ignoring all terms beyond a chosen one; replace a corner by a plane