Odious, sickening (9)
I believe the answer is:
repugnant
I believe this clue is a double definition.
'odious' is the first definition.
(thesaurus)
'sickening' is the second definition.
(thesaurus)
(Other definitions for repugnant that I've seen before include "Very unwelcome" , "vile" , "Loathsome" , "Nasty" , "Disgusting" .)