unfasten

C2+ Topic:Actions & Processes

US /ʌnˈfæsən/ UK /ʌnˈfɑːsən/ See IPA manual

Meanings

1

verb
to undo or release something that is fastened

He paused to unfasten the top button of his collar.

Thesaurus

Synonyms

1 verb · to undo or release... undo loosen unbuckle untie release detach

Opposites

fasten secure attach tie buckle

Word family

Derived forms unfastenedunfastening

Related forms fasten fast

Etymology

From un- ('reversal') + fasten, from Old English fæstnian ('to make firm, secure'), from fæst ('firm, fixed'), from Proto-Germanic *fastuz.

un- Old English fæstnian Old English *fastuz Proto-Germanic

View etymology graph ->

Topics

Actions & Processes Word Formation & Derivatives

External links

# unfasten

**Type:** Word
**Level:** C2+
**Part of speech:** verb
**IPA (US):** /ʌnˈfæsən/
**IPA (UK):** /ʌnˈfɑːsən/

## Meanings
1. to undo or release something that is fastened

## Examples
- He paused to unfasten the top button of his collar.

## Synonyms
- undo
- loosen
- unbuckle
- untie
- release
- detach

## Antonyms
- fasten
- secure
- attach
- tie
- buckle

## Derived Forms
- unfastened
- unfastening

## Related Forms
- fasten
- fast

## Roots and Affixes
- Root: un-
- Root: fæstnian
- Root: *fastuz

## Etymology
From un- ('reversal') + fasten, from Old English fæstnian ('to make firm, secure'), from fæst ('firm, fixed'), from Proto-Germanic *fastuz.

## AI Etymology
Unfasten is from un- ('reversal') + fasten, from Old English fæstnian ('to make firm, secure'), from fæst ('firm, fixed'), from Proto-Germanic *fastuz. Important recorded forms include un- (Old English), fæstnian (Old English), and *fastuz (Proto-Germanic). Morphologically, the word is a built form whose named elements carry part of the historical sense. The current sense covers to undo or release something that is fastened. The wider family includes derived forms such as unfastened and unfastening and related words such as fasten and fast.

## Topics
- Actions & Processes
- Word Formation & Derivatives

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