adverb
without rest; tirelessly; incessantly
Describes an action continuing without pause or break; often used with verbs of working, moving, or occurring.
彼は休みなく働き続けた。
He kept working without rest.
雨が休みなく降っている。
It has been raining incessantly.
Similar meaning 'incessantly', but 絶え間なく emphasizes no gaps or interruptions, while 休みなく focuses on lack of rest or pause.
Also means 'without resting', but 休まずに is a negative te-form of 休む and often used in more concrete contexts like 'without taking a break', while 休みなく is more adverbial and can be used for continuous actions.
Formed from the noun 休み (rest, break) + なく (adverbial form of ない, 'not'). The combination functions as an adverb meaning 'without rest'.