noun, noun or participle which takes 'suru', intransitive verb
hasty act; rash act
Refers to acting without careful thought; often used in formal or written contexts. The する form means 'to act rashly'.
軽挙は慎むべきだ。
You should refrain from rash actions.
彼は軽挙して失敗した。
He acted hastily and failed.
軽率 is an adjective meaning 'thoughtless' or 'careless', describing a person's character or attitude, while 軽挙 refers to the act itself.
Compound of 軽 (light, easy) and 挙 (action, undertaking). The exact historical derivation is uncertain, but the meaning follows naturally from the kanji components.