faulty

Synonyms: adulterated amiss awry bad below par blamable blemished botched broken cracked damaged debased defective deficient distorted erroneous fallacious fallible false flawed frail impaired imperfect imprecise inaccurate inadequate incomplete inexact injured insufficient invalid lame leaky lemon maimed malformed malfunctioning marred out of order rank sick tainted unfit unreliable unretentive unsound warped weak wrong

Antonyms: accurate correct perfect sound strong working