Word.ws English Dictionary

unfallible

unfallible is the obsolete form of infallible.

Meaning of infallible

Adjective

infallible (comparative more infallible, superlative most infallible)

  1. Without fault or weakness; incapable of error or fallacy.
    • He knows about many things, but even he is not infallible.
  2. Certain to produce the intended effect; sure.
    • Try this infallible cure for hiccups.
  3. Certain to result from a specific cause; inevitable.
    • Paley can only account for this fact by saying that we are constrained by the fear of punishment in a future life, such having been declared to us by revelation to be the infallible result of wrong action.1871, Alexander Grant, “On the Nature and Origin of the Moral Ideas”, in Papers Read at the Meetings of the Metaphysical Society

See all 5 meanings of infallible

Forms of unfallible

comparativemore unfallible
superlativemost unfallible

Origin of unfallible

From un- + fallible.

Questions about unfallible

What is unfallible the obsolete form of?
Unfallible is the obsolete form of infallible.

Words near unfallible in the dictionary

  1. unfalcated
  2. unfallacious
  3. unfallaciously
  4. unfallen
  5. unfallenness
  6. unfallible
  7. unfalling
  8. unfallowed
  9. unfalse
  10. unfalsifiability
  11. unfalsifiable

Source and license

Adapted from Wiktionary: unfallible (page history and authors); infallible (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “unfallible.” Word.ws, https://word.ws/unfallible. Based on Wiktionary, CC BY-SA 4.0.