| Term | Definition |
| tacit | (adj) understood without being openly expressed; implied; unspoken |
| tautology | (noun) 1. needless repetition of the same sense in different words; redundancy. 2. Logic. An empty or vacuous statement composed of simpler statements in a fashion that makes it logically true whether the simpler statements are factually true or false; for example, the statement ‘Either it will rain tomorrow or it will not rain tomorrow.’ |
| temper | (verb) 1. to modify by the addition of a moderating element; moderate. 2. to bring to a desired consistency, texture, hardness, softness, or other physical condition by or as if by blending, admixing, or kneading. 3. Music. to adjust (the pitch of an instrument) to a temperament. |
| tempestuous | (adj) 1. of, relating to, or resembling a tempest. 2. tumultuous; stormy |
| tenebrous | (adj) dark; gloomy; obscure |
| termagant | (noun) a quarrelsome, scolding woman; a shrew. (adj) shrewish; scolding |
| trenchant | (adj) 1. incisive or keen, as language or a person; caustic; cutting. 2. vigorous; effective; energetic. 3. clearly or sharply defined; distinct. |
| turgid | (adj) 1. swollen; distended; tumid. 2. inflated, overblown, or pompous; bombastic. |
| turpitude | (noun) 1. vile, shameful, or base character; depravity. 2. a vile or depraved act. |
| ubiquitous | (adj) existing or being everywhere, esp. at the same time; omnipresent. |
| ullage | (noun) 1. the amount by which the contents fall short of filling a container, as a cask or bottle. 2. the quantity of wine, liquor, or the like, remaining in a container that has lost part of its contents by evaporation, leakage, or use. 3. Rocketry. the volume of a loaded tank of liquid propellant in excess of the volume of the propellant; the space provided for thermal expansion of the propellant and the accumulation of gases evolved from it. |
| unctuous | (adj) 1. characterized by excessive piousness or moralistic fervor, esp. in an affected manner; excessively smooth, suave, or smug. 2. oily; greasy. |
| usurp | (verb) to seize and hold (a position, office, power, etc.) by force or without legal right. |
| vacuous | (adj) 1. without contents; empty. 2. lacking in ideas or intelligence. 3. expressing or characterized by a lack of ideas or intelligence; inane; stupid. 4. purposeless; idle. |
| vicissitude | (noun) 1. a change or variation. 2. the quality of being changeable 3. successive, alternating, or changing phases or conditions, as of life or fortune; ups and downs. |
| virago | (noun) a loud-voiced, ill-tempered, scolding woman; shrew. |
| vortex | (noun) 1. a whirling mass of air, water, fire, etc. 2. something regarded as drawing into its powerful current everything that surrounds it: the vortex of war. 3. (in Cartesian philosophy) a rapid rotatory movement of cosmic matter about a center, regarded as accounting for the origin or phenomena of bodies or systems of bodies in space. |
| visceral | (adj) 1. perceived in or as if in the viscera; profound. 2. instinctive. |