faulty

IPA/ˈfɔːlti/
KK[fˈɔlti]IPA/ˈfɔːlti/

faulty — adjective

  • faultypositive
  • faultiercomparative
  • faultiestsuperlative

1. describes a product, machine, or piece of equipment that was made with a defect,

1.形容詞B1
釋義

describes a product, machine, or piece of equipment that was made with a defect, so it does not perform correctly or safely

例句

Ryo returned the faulty laptop because it kept turning off during class.

The fire started because of a faulty wire in the kitchen wall.

faulty + concrete noun (wire / brake system)

同義詞
  • defective

    more formal, often used in quality-control or technical contexts

  • broken

    more common in everyday speech, implies physical damage or complete failure

  • malfunctioning

    focuses on failure during operation rather than a design flaw

反義詞
  • working

    informal, used in everyday situations

  • functional

    neutral register, describes something that performs its intended task

文法句型

faulty + noun

be + faulty

用法筆記

Often used with nouns for electrical or mechanical items such as wire, brake, screen, or engine. Can refer to both a manufacturing defect and a failure during use.

常見錯誤

❌The judge found him faulty of the crime.
✅The judge found him guilty of the crime.
💡'Faulty' describes objects or ideas that are defective, not people who are responsible for wrongdoing.

2. based on incorrect information or flawed thinking, making an argument, conclusio

2.形容詞B2
釋義

based on incorrect information or flawed thinking, making an argument, conclusion, or decision unreliable

例句

The scientist found faulty logic in the experiment's design and repeated it.

faulty + abstract noun (logic / reasoning / assumption)

Lucas argued that the report was based on faulty assumptions about the economy.

同義詞
  • flawed

    focuses on an inherent weakness in the reasoning itself

  • erroneous

    more formal, often used in academic or legal writing

  • incorrect

    direct and neutral, common in everyday language

  • unsound

    specifically for arguments, theories, or logic that lack a valid basis

反義詞
  • correct

    direct opposite, used for facts and conclusions

  • sound

    describes reasoning or arguments that are logically valid

  • valid

    used in formal and logical contexts

文法句型

faulty + abstract noun

be + faulty

用法筆記

Typical objects are abstract nouns such as logic, reasoning, assumption, conclusion, or analysis. Unlike sense 1, this sense rarely applies to physical objects.

常見錯誤

❌I made a faulty on the test.
✅I made a mistake on the test.
💡'Faulty' is an adjective and cannot be used as a noun; use 'mistake' or 'error' after 'a'.