adjective

Very unpleasant.

disagreeable,irksome,troublesome,annoying,irritating,vexatious,displeasing,uncomfortable,distressing,nasty,horrible,appalling,terrible,awful,dreadful,hateful,detestable,miserable,abominable,execrable,odious,invidious,objectionable,offensive,obnoxious,repugnant,repulsive,repellent,revolting,disgusting,distasteful,nauseating,unsavoury,unpalatable,ugly

adverb

To an extreme and unpleasant degree.