CEASELESS
ceaseless, constant, incessant, never-ending, perpetual, unceasing, unremitting
(adjective) uninterrupted in time and indefinitely long continuing; “the ceaseless thunder of surf”; “in constant pain”; “night and day we live with the incessant noise of the city”; “the never-ending search for happiness”; “the perpetual struggle to maintain standards in a democracy”; “man’s unceasing warfare with drought and isolation”; “unremitting demands of hunger”
Source: WordNet® 3.1
Etymology
Adjective
ceaseless (not comparable)
Without an end.
Without stop or pause, incessant.
Source: Wiktionary
Cease"less, a.
Definition: Without pause or end; incessant.
Cease"less, adv.
Definition: Without intermission or end.
Source: Webster’s Unabridged Dictionary 1913 Edition