Synonyms:
ceaseless, constant, incessant, never-ending, perpetual, unceasing, unremitting
Meaning: 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"
Usage examples
"My dears," he said after a minute, "the day is the same length as anything that is the same length as it." And he resumed his never-ending task of polishing.
The slow, the never-ending approach to truth consists in perpetually forming and testing hypotheses, accepting those which at the time seem to fit the facts and rejecting the others.
Who has not heard of Mount Olympus,--that high abode of all the powers of type, that favoured seat of the great goddess Pica, that wondrous habitation of gods and devils, from whence, with ceaseless hum of steam and never-ending flow of Castalian ink, issue forth fifty thousand nightly edicts for the governance of a subject nation?