unfastening

un·fas·ten

U0070300 (ŭn-făs′ən)v. un·fas·tened, un·fas·ten·ing, un·fas·tens v.tr. To separate the connected parts of.v.intr. To become loosened or separated.

Thesaurus

Noun

1.

unfastening - loosening the ties that fasten something; "the tying of bow ties is an art; the untying is easy"untying, undoinglaxation, loosening - the act of making something less tight