LATIN DICTIONARYLexicon Latīnum
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“insane” in Latin

The English word insane itself goes back to Latin sānus, through īnsānus.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

insane
vecors: insanus: mente captus: delirus [SYN. in MAD]: to be insane, insanire: mente captum esse: mentis errore affectum esse: delirare: to become insane, mente capi or alienari: mentis errore affici.

Quick answer

What is the Latin word for insane?
The usual Latin words for “insane” are vēcors, īnsānus, dēlīrus; also īnsāniō, dēlīrō, aliēnō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.