The old Kaiser Franz Joseph, faithful and hardworking, was the obverse of the feckless and impetuous German kaiser.
Referring to his numerous divorces, he writes, "I was young, impetuous, and lonely."
Zakir is a fearless and impetuous fighter, a former Guantanamo prisoner who earned a reputation for brutality on the battlefield.
late 14c., "hot-tempered, fierce," from Old French impetuos (13c.) and directly from Late Latin impetuosus "impetuous, violent," from Latin impetus "attack" (see impetus). Related: Impetuously; impetuousness.