dirtyThis shirt is dirty.
filthyWash your hands before dinner - they're filthy!
scruffyHe's the typical scruffy student.
messyBen's bedroom is always really messy.
grimyDon't wipe your grimy hands on that clean towel!
muckyinformalGet your mucky boots out of my kitchen!
soiledSoiled tablecloths should be soaked in detergent.
uncleanDisease spreads through unclean water.
contaminatedTheir water supply was contaminated with pesticides.
squaliddisapprovingHe lived in a squalid dormitory.