trenchant

adjectives

having keenness and forcefulness and penetration in thought, expression, or intellect
"searching insights"; "trenchant criticism"
searching, trenchant
is derived from
trenchancy
characterized by or full of force and vigor
"a hard-hitting expose"; "a trenchant argument"
hard-hitting, trenchant
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"
clear-cut, distinct, trenchant
is derived from
trenchancy