Fetching details from the dictionary...

dirty; filthy; foul; unclean
disordered; messy; untidy; poor (e.g. handwriting)
indecent (language, etc.); dirty; vulgar; coarse
dastardly; mean; base; underhanded
stingy; greedy
手が穢いから洗おう。
My hands are dirty so I'll wash them.
穢い水を飲んではいけない。
You must not drink dirty water.
部屋が穢くてお客さんを呼べないよ。
The room is too dirty to have guests over.