形容词

1. 不停的;连续的;持续不断的
An incessant process or activity is one that continues without stopping.

1. uninterrupted in time and indefinitely long continuing

e.g. the ceaseless thunder of surf
in constant pain
night and day we live with the incessant noise of the city
the never-ending search for happiness
the perpetual struggle to maintain standards in a democracy
man's unceasing warfare with drought and isolation
unremitting demands of hunger

Synonym: ceaselessconstantnever-endingperpetualunceasingunremitting