1. (adverb)endlessly, ceaselessly, incessantly, unceasingly, unendingly, continuously with unflagging resolve "dance inspires him ceaselessly to strive higher and higher toward the shining pinnacle of perfection that is the goal of every artiste"
2. (adverb)constantly, always, forever, perpetually, incessantly without interruption "the world is constantly changing"
Definition of 'incessantly' 
