Old English clænlic "morally pure, innocent," from clæne (see clean (adj.)). Of persons, "habitually clean," from c. 1500.
cleanly (adv.)
late Old English clænlice "entirely, wholly;" see clean (adj.) + -ly (2). From c. 1200 as "in a clean manner; decently, morally."
she played the piano accompaniment cleanly
he bounced it cleanly off the wall
the motor burns cleanly
cleanly in their persons and habitations
clean
clean-cut
cleaner
cleanliness
clean-living
cleanly
cleanness
cleanse
cleanser
cleansing
clean-up