Adjective
1. having keenness and forcefulness and penetration in thought, expression, or intellect;
"searching insights""trenchant criticism"2. characterized by or full of force and vigor;
"a hard-hitting expose""a trenchant argument"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"