unascertained

C2+ Topic:Describing Qualities

US /ˌʌnæsɚˈteɪnd/ UK /ˌʌnæsəˈteɪnd/ See IPA manual

Meanings

1

adj
not yet determined or established with certainty

The cause of the fire remained unascertained for weeks.

Thesaurus

Synonyms

1 adj · not yet determined or... undetermined unknownunestablishedundecided unverifiedunconfirmed

Opposites

ascertained determined established confirmed

Word family

Related forms ascertain ascertainment certain

Etymology

From un- ('not') + ascertained, past participle of ascertain, from Old French acertener ('to make certain'), from a- ('to') + certain, from Latin certus ('sure, fixed'), from cernere ('to distinguish, decide').

un- Old English certus Latin cernere Latin

View etymology graph ->

Topics

Describing Qualities Word Formation & Derivatives

External links

# unascertained

**Type:** Word
**Level:** C2+
**Part of speech:** adj
**IPA (US):** /ˌʌnæsɚˈteɪnd/
**IPA (UK):** /ˌʌnæsəˈteɪnd/

## Meanings
1. not yet determined or established with certainty

## Examples
- The cause of the fire remained unascertained for weeks.

## Synonyms
- undetermined
- unknown
- unestablished
- undecided
- unverified
- unconfirmed

## Antonyms
- ascertained
- determined
- established
- confirmed

## Related Forms
- ascertain
- ascertainment
- certain

## Roots and Affixes
- Root: un-
- Root: certus
- Root: cernere

## Etymology
From un- ('not') + ascertained, past participle of ascertain, from Old French acertener ('to make certain'), from a- ('to') + certain, from Latin certus ('sure, fixed'), from cernere ('to distinguish, decide').

## AI Etymology
Unascertained is from un- ('not') + ascertained, past participle of ascertain, from Old French acertener ('to make certain'), from a- ('to') + certain, from Latin certus ('sure, fixed'), from cernere ('to distinguish, decide'). Important recorded forms include un- (Old English), certus (Latin), and cernere (Latin). Morphologically, the un- element marks negation, reversal, removal, or deprivation, while the base supplies the action, quality, or state being denied or undone. The modern sense is largely compositional, with the historical elements narrowing into a stable English lexical item. In current use it covers not yet determined or established with certainty. The wider family includes related words such as ascertain, ascertainment, and certain.

## Topics
- Describing Qualities
- Word Formation & Derivatives

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