ceaselessadjective · Level 3 SAT1uninterrupted in time and indefinitely long continuingThe ceaseless roar of the factory machinery made conversation impossible on the floor.ModuleLevel 3RegisteracademicCollectionCollection 044SAT Complete planAlso in Collection 044plight, slake, defamation, nonesuch, unceasing, abstainer, convolute, discontinuity and 1 more