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!
grubbyinformalHe was wearing an old pair of jeans and a grubby T-shirt.
muckyinformalGet your mucky boots out of my kitchen!
uncleanDisease spreads through unclean water.
contaminatedTheir water supply was contaminated with pesticides.
squaliddisapprovingHe lived in a squalid dormitory.