Incessant means going on and on without ever stopping. Incessant noise, incessant rain, incessant complaints.
It is always a complaint, since nothing pleasant is ever described this way. It is an exaggeration in almost every use, and the Latin behind it means not ceasing, which is a good deal stricter than anything anybody applies it to.
1adjectiveincessantGoing on and on without ever stopping.
“The incessant barking of the neighbour's dog kept us awake all night.”
incessant is a quality.
Latin incessans, in-, not, plus cessans, ceasing, from cessare, to stop.
Latin
incessāns
Middle English
incessaunte
English, today
incessant
From Late Middle English incessaunte, from Latin incessāns, from Latin - in- + cessāns.
Etymology from Wiktionary, CC BY-SA