WordNet sense 1 (of very poor quality or condition):

execrable, miserable, woeful, wretched

WordNet sense 2 (of low or inferior quality):

inferior

WordNet sense 3 (bringing or deserving severe rebuke or censure):

criminal, reprehensible, vicious, condemnable

WordNet sense 4 (contrary to conscience or morality or law):

wrong

WordNet sense 5 (bad; unfortunate):

distressing, lamentable, pitiful, sad, sorry

WordNet sense 6 (having undesirable or negative qualities):

bad