noun
working non-stop; incessant working
Describes working continuously without a break, often with a nuance of exhaustion or relentlessness. Commonly used in phrases like 働き詰めだ or 働き詰めの一日.
彼は朝から晩まで働き詰めだ。
He works non-stop from morning till night.
働き詰めの毎日で、少し休みたい。
With days of incessant working, I want a little rest.
Compound of 働き (continuative form of 働く 'to work') + 詰め (from 詰める 'to pack, to keep doing'). The 詰め suffix indicates doing something continuously or to the limit.