Insane
/ɪnˈseɪn/noun
In a state of mental illness or extreme folly.
Did you know?The roots of 'insane' connect to ancient notions of being 'unholy' or 'not sound', suggesting a deeper link to spiritual and moral disorder.
Etymological Timeline
Latin
Latin
insanus
“mad, crazy, unholy”
Old French
Old French
insene
“insane, foolish”
Middle English
Middle English
insane
“mad, non-sane, mentally ill”
Modern English
Modern English
insane
“mentally deranged, irrational”