incessant

Something incessant continues without interruption. When you're on a cross-country flight, it's tough to tolerate the incessant crying of a baby.

In Latin, cessare means 'to stop,' so when you add the negative prefix in- you get a word meaning never stopping. A near synonym is continual, but something incessant is more relentless; ceaseless is a closer synonym. It's rare to find incessant used in a positive way. Even incessant sunshine would grow boring.

Definitions of incessant
1

adj uninterrupted in time and indefinitely long continuing

“night and day we live with the incessant noise of the city”
Synonyms:
ceaseless, constant, never-ending, perpetual, unceasing, unremitting
continuous, uninterrupted
continuing in time or space without interruption

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.