Lock up
Lock up verb - To put in or as if in prison.
Make safe
Cite this Source
Make safe and Lock up. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/lock_up/make_safe
Lock up & Make safe. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/lock_up/make_safe>.
Make safe or Lock up. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/lock_up/make_safe.
Google Ngram Viewer shows how "lock up" and "make safe" have occurred on timeline