Foul (5)
'foul' is the definition.
(both can mean disgusting)
This is all the clue.
(Other definitions for squalid that I've seen before include "Extremely dirty" , "Poverty-stricken - filthy" , "run down" , "Slum-like" , "Wretched, filthy" .)
'foul' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for noisome that I've seen before include "Foul; putrid" , "Extremely unpleasant" , "Disgusting -- ie moons (anag)" , "Odorous" , "Offensive, noxious" .)
'foul' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for unclean that I've seen before include "Polluted" , "Soiled like an uncle" , "Foul" , "taboo" , "Ceremonially impure" .)
'foul' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for noxious that I've seen before include "Unwholesome" , "Harmful to health" , "foul" , "bad for you" , "Unpleasant and harmful" .)
'foul' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for awful that I've seen before include "Dreadful and dire" , "Horrific" , "Dreadful - spine-chilling" , "The pits" , "Very embarrassing" .)
'foul' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for fetid that I've seen before include "Malodorous, stinking" , "Putrid, malodorous" , "Nauseating" , "Noisome" , "Smelling bad, stinking" .)
'foul' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for putrid that I've seen before include "Rotting, fetid" , "Decomposing and fetid" , "Decaying, rotting" , "Bad smelling, rotting" , "Really rotten and foul-smelling" .)
'foul' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for vile that I've seen before include "Disgusting, quite evil" , "Evil, foul" , "Revolting" , "Cheap; shameful" , "Extremely unpleasant" .)