unfasten
Elementary (A2)
IPA: /ʌnˈfæsn/
KK: /ʌnˈfæsn/
intransitive verb
Definition
To become loose or detached from something that holds it in place.
Example
The button will unfasten when you pull on the string.
Tense Forms
Past: unfastened
Past Participle: unfastened
Conversation
Did you see how my backpack kept bouncing around while I walked?
Yeah, it looked like it might unfasten at any moment!
I know, right? I really need to fix those straps.
Definitely! You don't want it to fall apart on your way to class.
Synonyms & Antonyms
Synonyms
loosen
detach
release
Antonyms
fasten
secure
attach
transitive verb
Definition
To separate or release something that is fastened or secured.
Example
She had to unfasten her seatbelt before getting out of the car.
Tense Forms
Past: unfastened
Past Participle: unfastened
Conversation
Can you help me unfasten this stubborn watch strap?
Sure! It can be tricky sometimes.
I always struggle to unfasten it when I'm in a hurry.
Root Explanation
Unfasten → It is formed from "un-" (meaning not or opposite of) and "fasten" (from Old English "fæstan", meaning to secure or make firm). The word "unfasten" means to make something not secure or to release it from being fastened.
Memory Tip
Think of 'not' ('un-') securing something ('fasten') — that's why unfasten means to release or loosen.
Visually Confused Words
enfasten
fasten
unfeasted
uneastern
untaste
unstern
unpaste
unoften