incisive

Penetrating, clear, and sharp, as in operation or expression.

Having the quality of cutting into or dividing the substance of anything; cutting, or used for cutting.

Figuratively, sharply and clearly expressive; penetrating; trenchant; sharp; acute.

Having the power of breaking up or dissolving viscid or coagulated humors.

In anatomy and zoology: Having the character, function, or situation of an incisor tooth; incisorial.