unclickingn.
/(ˌ)ʌnˈklɪkɪŋ/, /(ˌ)ʌŋˈklɪkɪŋ/, U.S. /ˌənˈklɪkɪŋ/ The action of releasing or stopping a mechanism, esp. that of a lock, with a click or clicking sound; an instance of this.
ΚΠ
1860 Sharpe's London Mag. Nov. 248/1 The sound of the unclicking of the farm-gate.
1975 Van Nuys (Calif.) News 9 Sept. 21 a/1 The constant clicking and unclicking of watches..timing how fast each batter gets to first base.
1992 S. Mallery Tender Loving Care 118 He heard the unclicking of the lock, then the door was pulled open.
2016 C. Alger This was not Plan 234 There was a rustling on the other side of the door and an unclicking of locks.
This entry has been updated (OED Third Edition, June 2017; most recently modified version published online March 2022).
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n.1860