in ‧ ces ‧ sant /ɪnˈses ə nt/ BrE AmE adjective [usually before noun]
[ Date: 1400-1500 ; Language: Late Latin ; Origin: Latin cessare 'to delay' ]
continuing without stopping SYN constant :
The child’s incessant talking started to irritate her.
incessant rain
—incessantly adverb :
They quarreled incessantly.