Infallible

Synonyms for infallible

• dependable
• reliable
• certain

Antonyms for infallible

• fallible
• unreliable
• uncertain

Practice infallible on real SAT questions

Vocabulary like infallible appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.

Related SAT vocabulary

• Induce

  cause; cause to arise

• Indulge

  allow oneself pleasure

• Indulgent

  overly generous or lenient

• Industrious

  hardworking; characterized by hard work and perseverance

• Ineffable

  impossible to describe

• Inept

  lacking skill or ability

• Inert

  motionless; unable to move or resist motion

• Inevitable

  certain to happen and unavoidable