tren·chant /-ʧənt/
  (a.)銳利的,尖刻的,苛刻的,有力的,分明的,清晰的
  Trench·ant a.
  1. Fitted to trench or cut; gutting; sharp. “ Trenchant was the blade.”
  2. Fig.: Keen; biting; severe; as, trenchant wit.
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  trenchant
       adj 1: having keenness and forcefulness and penetration in thought,
              expression, or intellect; "searching insights";
              "trenchant criticism" [syn: searching]
       2: characterized by or full of force and vigor; "a hard-hitting
          expose"; "a trenchant argument" [syn: hard-hitting]
       3: 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" [syn: clear-cut, distinct]