godan verb (-su), transitive verb
beat back into shape; hammer back into form
Literal physical sense: to reshape a bent or deformed object by striking it repeatedly.
曲がった釘を金槌で叩き直す。
I hammer the bent nail back into shape.
godan verb (-su), transitive verb
straighten out; correct by discipline; reform
Figurative use: to correct a person's bad habits, attitude, or character through strict training, scolding, or discipline.
新入社員の怠惰な態度を先輩が叩き直した。
The senior colleague straightened out the new employee's lazy attitude.
悪い癖は早いうちに叩き直さないと直らない。
Bad habits won't be fixed unless you correct them early on.