Synonyms of unfastening

Noun

1. untying, undoing, unfastening, loosening, laxation

usage: loosening the ties that fasten something; "the tying of bow ties is an art; the untying is easy"

Verb

1. unfasten, undo

usage: cause to become undone; "unfasten your belt"

2. unfasten, open, open up

usage: become undone or untied; "The shoelaces unfastened"