Safety
Middle English: from Old French sauvete, from medieval Latin salvitas, from Latin salvus ‘safe’.
wiktionary
From Old French sauveté, from earlier salvetet, from Medieval Latin salvitas, salvitatem, from Latin salvus.
etymonline
safety (n.)
early 14c., from Old French sauvete "safety, safeguard; salvation; security, surety," earlier salvetet (11c., Modern French sauveté), from Medieval Latin salvitatem (nominative salvitas) "safety," from Latin salvus "uninjured, in good health, safe" (from PIE root *sol- "whole, well-kept"). Meaning "trigger-lock on a gun" is attested from 1881.
As a North American football position, first recorded 1931. As a type of score against one's own team, 1881. Safety-valve, which diminishes the risk of explosion, is from 1797; figurative sense recorded from 1818. Safety-net in literal sense (in machinery) by 1916, later of aerial circus performances (1920s); figurative use by 1950. Safety first as an accident-prevention slogan first recorded 1873.
