s (satellite adjective) 1) having keenness and forcefulness and penetration in thought, expression, or intellect ["searching insights"] ["trenchant criticism"]
s (satellite adjective) 2) characterized by or full of force and vigor ["a hard-hitting expose"] ["a trenchant argument"]
s (satellite adjective) 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"]