noun
punishment by striking with fists; fist punishment
A yojijukugo referring to physical punishment or discipline delivered by punching or beating with the fists. Often used in contexts of strict, sometimes violent, enforcement of rules, such as in sports teams, schools, or gangs.
昔の軍隊では、鉄拳制裁が日常的だったと言われている。
It is said that in the old military, punishment by fists was a daily occurrence.
He administered fist punishment to his junior.