san·i·ty 
/ˈsænəti/ noun
/ˈsænəti/ noun [noncount] 1 : the condition of having a healthy mind : the condition of being sane
▪ People have begun to doubt his sanity. ▪ She is the mother of six children but somehow keeps her sanity. ▪ I need a vacation to regain/recover my sanity. [=to begin to feel normal and relaxed again] — opposite insanity 2 : the condition of being based on reason or good judgment
▪ The sanity of the decision was never in question.
▪ People have begun to doubt his sanity. ▪ She is the mother of six children but somehow keeps her sanity. ▪ I need a vacation to regain/recover my sanity. [=to begin to feel normal and relaxed again] — opposite insanity
▪ The sanity of the decision was never in question.
