1. 永无止境的;永无休止的;永恒的
If you describe something bad or unpleasant as never-ending, you are emphasizing that it seems to last a very long time.

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: ceaselessconstantincessantperpetualunceasingunremitting