dirtyThis shirt is dirty.
scruffyHe's the typical scruffy student.
messyBen's bedroom is always really messy.
grimyDon't wipe your grimy hands on that clean towel!
grubbyinformalHe was wearing an old pair of jeans and a grubby T-shirt.
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.