Hygiene is a seven letter word and it means cleanliness.
The only word that comes to mind is "cleanliness". I double-checked in a thesaurus, and no other 11-letter words came up.
cleanliness
Wash is a four letter word meaning "to clean with water".
Wash is a four letter word meaning "to clean with water".
unclean...
clean?
"CLEAN"
Clean.
Mop.
clean
Pruritus!
acne
Condition.