TRENCHANT
distinct, clear-cut, trenchant
(adjective) clearly or sharply defined to the mind; “clear-cut evidence of tampering”; “Claudius was the first to invade Britain with distinct...intentions of conquest”; “trenchant distinctions between right and wrong”
trenchant, hard-hitting
(adjective) characterized by or full of force and vigor; “a hard-hitting expose”; “a trenchant argument”
searching, trenchant
(adjective) having keenness and forcefulness and penetration in thought, expression, or intellect; “searching insights”; “trenchant criticism”
Source: WordNet® 3.1
Etymology
Adjective
trenchant (comparative more trenchant, superlative most trenchant)
(obsolete) Fitted to trench or cut; gutting; sharp.
(figuratively) Keen; biting; vigorously articulate and effective; severe.
Source: Wiktionary
Trench"ant, a. Etym: [OF. trenchant, F. tranchant, p. pr. See Trench,
v. t.]
1. Fitted to trench or cut; gutting; sharp. " Trenchant was the
blade." Chaucer.
2. Fig.: Keen; biting; severe; as, trenchant wit.
Source: Webster’s Unabridged Dictionary 1913 Edition