Word.ws English Dictionary

unascertainable

UK/ˌʌnæsəˈteɪnəbl̩/US/ˌʌnæsɚˈteɪnəbl̩/

unascertainable adjective: that cannot be ascertained; uncertain, unable to be determined or discovered.

Adjective

unascertainable (comparative more unascertainable, superlative most unascertainable)

  1. That cannot be ascertained; uncertain, unable to be determined or discovered.
    • Everything one would wish to know of the relations of Aristotle and Alexander is unascertainable, the more so as legends were soon invented on the subject.1946, Bertrand Russell, History of Western Philosophy, I.19
    • Reality is different from, and more than, the totality of facts and events, which, anyhow, is unascertainable.1967 February 25, Hannah Arendt, “Truth and Politics”, in The New Yorker, page 84

Antonyms of unascertainable

Forms of unascertainable

comparativemore unascertainable
superlativemost unascertainable

Origin of unascertainable

From un- + ascertainable.

Words formed from unascertainable

Questions about unascertainable

What does unascertainable mean?
Unascertainable means that cannot be ascertained; uncertain, unable to be determined or discovered.
What part of speech is unascertainable?
Unascertainable is an adjective.
How do you pronounce unascertainable?
Unascertainable is pronounced /ˌʌnæsəˈteɪnəbl̩/ (UK).

Words near unascertainable in the dictionary

  1. UNAs
  2. unascendable
  3. unascended
  4. unascendible
  5. unascertainability
  6. unascertainable
  7. unascertainably
  8. unascertained
  9. unascetic
  10. unascribable
  11. unascribed

Source and license

Adapted from Wiktionary: unascertainable (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: “unascertainable.” Word.ws, https://word.ws/unascertainable. Based on Wiktionary, CC BY-SA 4.0.