
English word sanity comes from Latin sanus, Latin -itatem
sanus (Latin)
(of style) correct, sensible, sober, chaste. Sound in body, healthy. Sound in mind, sane.
-itatem (Latin)
sanitas (Latin)
Correctness of style, propriety. Health, soundness of body. Sanity, soundness of mind.
sanité (Middle French)
sanity (English)
Reasonable and rational behaviour.. The condition of being sane.