cease ‧ less /ˈsiːsləs/ BrE AmE adjective
[ Word Family: noun : ↑ cessation , ↑ cease ; verb : ↑ cease ; adverb : ↑ ceaselessly ; adjective : ↑ ceaseless ]
happening for a long time without stopping:
the ceaseless fight against crime
—ceaselessly adverb :
The men worked ceaselessly through the night.