loathsome - adjective

• causing or able to cause nausea
• highly offensive; arousing aversion or disgust

loathsome - thesaurus

disgustful   disgusting   distasteful   foul   loathly   nauseating   nauseous   noisome   offensive   queasy   repellant   repellent   repelling   revolting   sickening   skanky   vile   wicked   yucky