n. 25B6; adjective
bad workmanship : SUBSTANDARD, poor, inferior, second-rate, second-class, unsatisfactory, inadequate, unacceptable, not up to scratch, not up to par, deficient, imperfect, defective, faulty, shoddy, amateurish, careless, negligent, miserable, sorry; incompetent, inept, inexpert, ineffectual; informal crummy, rotten, pathetic, useless, woeful, bum, lousy, ropy, not up to snuff; Brit. informal duff, rubbish.
the alcohol had a really bad effect on me : HARMFUL, damaging, detrimental, injurious, hurtful, inimical, destructive, ruinous, deleterious; unhealthy, unwholesome.
the bad guys : WICKED, sinful, immoral, evil, morally wrong, corrupt, base, black-hearted, reprobate, amoral; criminal, villainous, nefarious, iniquitous, dishonest, dishonourable, unscrupulous, unprincipled; informal crooked, bent, dirty; dated dastardly.
you bad girl! : NAUGHTY, badly behaved, disobedient, wayward, wilful, self-willed, defiant, unruly, insubordinate, undisciplined.
bad news : UNPLEASANT, disagreeable, unwelcome; unfortunate, unlucky, unfavourable; terrible, dreadful, awful, grim, distressing.
a bad time to arrive : INAUSPICIOUS, unfavourable, inopportune, unpropitious, unfortunate, disadvantageous, adverse, inappropriate, unsuitable, untoward.
a bad accident : SEVERE, serious, grave, critical, acute; formal grievous.
the meat's bad : ROTTEN, off, decayed, decomposed, decomposing, putrid, putrefied, mouldy, mouldering; sour, rancid, rank, unfit for human consumption; addled.
if you still feel bad, stay in bed. : See ill adjective sense 1.
a bad knee : INJURED, wounded, diseased; Brit. informal gammy, knackered; Austral./NZ informal crook.
I felt bad about leaving them : GUILTY, conscience-stricken, remorseful, guilt-ridden, ashamed, contrite, sorry, full of regret, regretful, shamefaced.
a bad cheque : INVALID, worthless; counterfeit, fake, false, bogus, fraudulent; informal phoney, dud.
bad language : OFFENSIVE, vulgar, crude, foul, obscene, rude, coarse, smutty, dirty, filthy, indecent, indecorous; blasphemous, profane.
good, beneficial, virtuous, well behaved, minor, slight, fresh, unrepentant.
25A0; not bad ALL RIGHT, adequate, good enough, reasonable, fair, decent, average, tolerable, acceptable, passable, middling, moderate, fine; informal OK, so-so, fair-to-middling.