Definition of ceaseless adjective from the Oxford Advanced American Dictionary

      

    ceaseless

     adjective
    adjective
    NAmE//ˈsisləs//
     
    (formal)
     
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  1. 1not stopping; seeming to have no end synonym constant, interminable
  2. 2 the ceaseless rain His ceaseless questions began to annoy me.
ceaselessly
 
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adverb
See the Oxford Advanced Learner's Dictionary entry: ceaseless