宿しゅく直ちょく

noun, noun or participle which takes 'suru', intransitive verb

night duty; night watch; night shift

Refers to staying overnight at a workplace (e.g., office, hospital, school) to be on duty or stand guard. Often used in institutional settings.

• 今こん夜やは宿しゅく直ちょくなので、家いえに帰かえれません。

  I'm on night duty tonight, so I can't go home.

• 宿しゅく直ちょくの先せん生せいが校こう内ないを見み回まわっている。

  The teacher on night duty is patrolling the school.