Word Type

Verb

The word "unfasten" can be used as a verb.

Word Relationships

Opposites (Antonyms)

button button up do up fasten tie up zip zip up

Derived From

fasten

Broader Terms (Hypernyms)

open open up undo

Narrower Terms (Hyponyms)

unbutton untie unzip

Manner Of

open undo

Related Terms

agency detach

Synonym Network

undo unhook untie

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.