faulty

fault +‎ -y

• IPA^(key): /ˈfɔːlti/

• Audio (US)

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faulty (comparative faultier, superlative faultiest)

1. Having or displaying faults; not perfect; not adequate or acceptable.

   They replaced the faulty wiring and it has worked fine ever since.

   I don't think you can infer that from the premise. It's a faulty argument.

2. (obsolete) At fault, to blame; guilty.
   • 1590, Edmund Spenser, The Faerie Queene, II.iv:

     Her faultie Handmayd, which that bale did breede, / Confest, how Philemon her wrought to chaunge her weede.

• Nouns to which "faulty" is often applied: goods, equipment, product, wiring, construction, memory, thinking, design, hardware, software, unit, part, component, assumption, reasoning, premise, gene, operation, technique, merchandise, circuit, code, analysis, posture, machine, method, habit, process, communication.

• faultless

• faultiness