Added 9 October 2026
insane
/ɪnˈseɪn/ adjective
In Latin: dēmēns, īnsānus, vēcors Wiktionary
adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about insane at Wordnik → Where our words come from →
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Afflicted with or characteristic of mental derangement.
was declared insane
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Very foolish.
harebrained ideas
Origin
From Latin īnsānus (“unsound in mind; mad, insane”), from in- + sānus (“sound, sane”), equivalent to in- + sane.
From Wiktionary, via Kaikki.org (CC BY-SA)