Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Origin: cleanly 'pure, clean' (11-21 centuries), from Old English clænlic, from clæne; CLEAN1

cleanliness

 noun
     
clean‧li‧ness [uncountable]
the practice of keeping yourself or the things around you clean:
a high standard of cleanliness
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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