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un·fas·ten

unfasten

 
pronunciation:
uhn fae sn
part of speech: verb
inflections: unfastens, unfastening, unfastened
definition: If you fasten something, you make it stay together or hold something together. If you unfasten something, you open things up. If you unfasten the buttons on your shirt, your shirt becomes open. If you unfasten your seatbelt in a car, you can get out of your seat.
Ariana unfastened the dog's leash and let him run free.
antonyms:
fasten
similar words:
loosen, release