The adjective incisive means someone expressing their thoughts or ideas in a clear and direct way that you can easily approve or agree to it.
Synonyms are intelligent, concise, penetrating, or keen.
The word origins from Old French (early 15th century) incisif (medical) meaning “invasive, effective”, and directly from Medieval Latin incisivus (source also from Latin incis-, past participle stem of incidere meaning “to cut into”.
The recruiting officer loved his incisive answers in the interview.
The jury were awed by the lawyer’s incisive arguments.
The whole team was disappointed as the presentation was less incisive than they had planned.