Advanced and Proficiency Vocabulary for Exams(e.g.GRE, Banks, Civil Services, SAT / LSAT). For IELTS/TOEFL, and everyday spoken vocabulary, go to our Spoken Vocabulary Database.

infallible | infallibility

infallible infallibility
incapable of error or failure
  • How to Memorize
    • infallible - unfailing
  • Analysis

    To be ‘infallible’ means to never be wrong, fail, or make a mistake. Since nobody is that perfect, this word is typically used with ‘not’ before it. However, it may sometimes be used in the context of something that always seems to be right or effective, even if that is not the case.

  • Exam DBSpoken DBOther
    Synonymsunerring, unfailing, dependable,
    Antonymsfallible, imperfect, unreliable,
  • Example(s)
    1. Don’t make your decision based purely on what others are telling you. Even the experts are not infallible.

    2. Mike can always be relied upon to remember names and details. It’s like he’s got an infallible memory.

    3. Our manager’s obstinate belief in her own infallibility means that she never takes advice from others.