Origin of cleanseMiddle English clensen ; from Old English clænsian ; from clæne, clean
transitive verbcleansed, cleans·ing, cleans·es
Origin of cleanseMiddle English clensen, from Old English cl&aemac;nsian, from cl&aemac;ne, pure, clean.
(third-person singular simple present cleanses, present participle cleansing, simple past and past participle cleansed)
From Old English clǣnsian, from West Proto-Germanic *klainisōną, from *klainiz (“clean”)