adverb
ceaselessly; continually; all the time
Emphasizes that an action or state continues without pause. Often used in the phrase のべつ幕なし (のべつまくなし) meaning 'nonstop' or 'endlessly'.
彼はのべつ文句を言っている。
He is complaining ceaselessly.
のべつ幕なしにしゃべり続けた。
He kept talking nonstop.