to warn against; to caution against
to admonish; to scold; to rebuke
to prohibit; to forbid; to ban
先生が生徒の行動を戒めた。
The teacher warned the student about his behavior.
自分を戒めて二度と繰り返さないと誓った。
I admonished myself and vowed never to repeat the mistake.
歴史は過ちを戒める教訓を与えてくれる。
History gives us lessons that warn against mistakes.