trenchant

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

searching hard-hitting clear-cut distinct

trenchantly