Trenchant (adjective)

Having a sharp edge or a sharpness that is capable of cutting; cutting deeply and quickly; incisive, forceful, and effective.

Origin:

From the old french word "trenchant" meaning "cutting".

Examples:

1. The lawyer's trenchant argument won the case.
2. The writer's trenchant criticism of the government was widely read.
3. The doctor"s trenchant advice saved the patient"s life.
4. The speaker's trenchant wit made the audience laugh.
5. The sword had a trenchant blade that could cut through metal.