noun
night watch; night guard duty
Refers to the act of keeping watch or being on guard duty at night, or the person performing that duty.
彼は今夜、夜詰めの当番だ。
He is on night watch duty tonight.
夜詰めの警備員が巡回している。
The night watch security guard is patrolling.
Compound of 夜 (yo, 'night') and 詰め (zume, from 詰める tsumeru, 'to be on duty' or 'to stay at a post'). The reading よづめ reflects rendaku voicing of つめ to づめ.