厳罰 げんばつ
gembatsu

Noun

1. severe punishment; rigorous measures

あ、みんなには内緒 ないしょだよ?寮 りょう夜中 よなか すのは厳罰 げんばつだからね?
a minnaniwa naishodayoryōo yonakani nukedasu nowa gembatsudakarane
Oh, that's a secret, OK? Because slipping out of the dorm in the night is severely punished.