adverb
incessantly; without a pause; continuously
Describes an action or state that continues without interruption. Often used with verbs like 降る (rain), 鳴る (ring), or 続く (continue).
雨が絶え間なく降り続いている。
The rain has been falling incessantly.
電話が絶え間なく鳴っている。
The phone is ringing without a pause.
Derived from 絶え間 (taema, 'pause, interval') + なく (adverbial form of ない, 'not'), literally 'without a pause'.