Be in
Lock
Lock verb - Fasten with a lock.
Both terms in one sentence
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Chekhov's Gunman: Fess Higgins in "Jaynestown", who seems to be in an unimportant C plot with Inara...until he releases his father's land-lock on Serenity.
Source: Series / Firefly - Georgina is lucky enough to be in her default form when the lock begins — another succubus is not so lucky and gets locked into a completely different body.
Source: Shapeshifter Mode Lock - Jurgen clearly expects this trope to be in effect when he shoots the conference room door lock in the Mechanicus shrine, but the door stays locked.
Source: Destruction Equals Off-Switch
Cite this Source
Lock and Be in. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/be_in/lock
Be in & Lock. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/be_in/lock>.
Lock or Be in. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/be_in/lock.
Google Ngram Viewer shows how "be in" and "lock" have occurred on timeline