adjective
1.
falling short of a standard of what is satisfactory
a bad repair job
Synonyms: amiss, ||bum, ||crappy, dissatisfactory, poor, ||punk, rotten, unsatisfactory, up, wrong
Related Word: deficient, inadequate, inferior; careless, slipshod; defective, disordered, off, unsound; execrable, ||lousy, miserable, ||pisspoor, wretched; inadmissible, objectionable, unacceptable; insufferable, intolerable
Idioms: below par, not up to snuff ( or scratch)
Contrasted words: excellent, fine, meritorious; acceptable, adequate, sound
2.
Synonyms: wrong 1, evil, immoral, iniquitous, reprobate, sinful, vicious, wicked
Related Word: arrant, peccant; graceless, improper, indecorous, untoward; disorderly, misbehaving, naughty, rowdy, ruffianly, unruly; froward, perverse
Antonyms: good
3.
Synonyms: evil 5, ill, unfavorable
4.
Synonyms: evil 6, inauspicious
5.
having undergone decay
one bad apple can spoil the barrel
Synonyms: decayed, putrid, rotten, spoiled
Related Word: fusty, stale; mildewed, moldered, moldy, moth-eaten, musty, rancid, worm-eaten; decomposed, putrefied, putrifacted; tainted, turned
Contrasted words: crisp, dewy, fresh, sweet, unspoiled; choice, picked, prime
Antonyms: good
6.
Synonyms: naughty 1, ill-behaved, misbehaving, mischievous, paw
7.
Synonyms: tough 8, rough
8.
arousing discomfort or distaste
a bad smell
Synonyms: ||chiselly, disagreeable, displeasing, rotten, sour, unhappy, unpleasant
Related Word: disgusting, foul, nauseating, noisome, noxious, offensive, repulsive, sickening; abhorrent, hateful, loathsome, obnoxious; uneasy; thankless, ungrateful; distasteful, distressing, sticky; ungracious, unhandsome
Contrasted words: agreeable, pleasant, pleasing, refreshing, soothing; unoffensive
9.
Synonyms: harmful , damaging, deleterious, detrimental, evil, hurtful, injurious, mischievous, nocent, nocuous
10.
Synonyms: downcast , crestfallen, dejected, depressed, disconsolate, dispirited, down, downhearted, low, woebegone
11.
Synonyms: null , invalid, null and void, void