Open English Wordnet
Adjectives
(s)searching, trenchanthaving keenness and forcefulness and penetration in thought, expression, or intellect“searching insights”,
“trenchant criticism” (s)hard-hitting, trenchantcharacterized by or full of force and vigor“a hard-hitting expose”,
“a trenchant argument” (s)clear-cut, distinct, trenchantclearly 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”