7 letters · 9 points in Scrabble
adjective soiled or likely to soil with dirt or grime
adjective having a physical or moral blemish so as to make impure according to dietary or ceremonial laws; ; -Leviticus 11:3
originFrom Middle English unclene, from Old English unclǣne, equivalent to un- + clean.
Etymology from Wiktionary, CC BY-SA 3.0