iincisive
adj.
5ML incisivus < L incisus: see INCISE6
1 cutting into
2 sharp; keen; penetrating; acute !an incisive mind"
3 of the incisors
in[ci4sive[ly
adv.
in[ci4sive[ness
n.
SYN.—incisive is applied to speech or writing that seems to penetrate directly to the heart of the matter, resulting in a clear and unambiguous statement [an incisive criticism]; trenchant implies clean-cut expression that results in sharply defined categories, differences, etc. [a trenchant analysis]; cutting implies incisive qualities but also connotes such harshness or sarcasm as to hurt the feelings [his cutting allusion to her inefficiency]; biting implies a caustic or stinging quality that makes a deep impression on the mind [his biting satire]