Find Antonyms

fasten Antonyms

Opposite of fasten

Because the opposite of fasten shifts with each meaning, the 10 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
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• verb (Context 1)

To attach, join, or secure something firmly in place using a clasp, buckle, knot, bolt, or similar device.

Usage Example

"Please unfasten your seatbelts before the aircraft begins its descent."

Strongest
unfasten
detach
undo
Strong
loosen
unbuckle
unhook
release

• verb (Context 2)

To become closed, joined, or locked securely in place (of a garment, door, or clasp).

Usage Example

"This vintage dress fastens down the back with a row of tiny pearl buttons."

Strongest
unfasten
open

• verb (Context 3)

To direct or fix one's eyes, thoughts, or attention steadily upon someone or something.

Usage Example

"The dog fastened its gaze on the treat in the trainer's hand."

Strong
avert
divert

Similar words to fasten

Words similar to fasten shift depending on context. Common synonyms include:

fix
secure
attach
focus
affix
close
rivet
shut
See all synonyms of fasten

• Nearby Words

fastback
fastball
fastballer
fasten
fastening
fastidious
fastidiously

Cite this Entry

Wordmom. (2026). Antonyms for Fasten. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/fasten
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