Word.ws English Dictionary

unfast

unfast verb: to loose; release.

Verb

unfast (third-person singular simple present unfasts, present participle unfasting, simple past and past participle unfasted)

  1. (transitive) To loose; release.

Adjective

unfast (comparative more unfast, superlative most unfast)

  1. Not fast or safe; not secure.

Forms of unfast

Verb
third-person singular presentunfasts
present participleunfasting
past participleunfasted
pastunfasted
Adjective
comparativemore unfast
superlativemost unfast

Origin of unfast

From Middle English unfasten, unvesten, onfesten, equivalent to un- + fast.

From un- + fast.

Words formed from unfast

Questions about unfast

What does unfast mean?
Unfast means to loose; release.
What part of speech is unfast?
Unfast can be a verb or an adjective.
What is the past tense of unfast?
The past tense of unfast is unfasted.

Words near unfast in the dictionary

  1. unfashionableness
  2. unfashionably
  3. unfashioned
  4. unfashioning
  5. unfashions
  6. unfast
  7. unfasted
  8. unfasten
  9. unfastenable
  10. unfastened
  11. unfastener

Source and license

Adapted from Wiktionary: unfast (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.

Last updated:

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