unremitting
un-rih-MIT-ingadjMeaning never letting up or slackening
Memory hook UN-REMITTING: it never lets up. Hour after hour, the desert sun blazes down on the travelers, with no cloud and no shade. The heat is unremitting.
The hikers trudged on through the unremitting wind, which never eased for a moment.
In context Her success came from years of unremitting practice: four hours at the piano every day, through holidays and summers alike.
Similar relentless, ceaseless, constant, unrelenting
Opposite intermittent, sporadic, occasional
From un- (not) + remit, “to slacken, ease off,” from Latin remittere, “to send back, let go.”