G3912
παραφρονέω
be insane
παρα-φρονέω (ιαρά, φρήν), [in LXX: Zec.7:11 (סָרַר)* ;] to be beside oneself, be deranged: 2Co.11:23.† (AS)
The KJV translates G3912 in the following manner:
fool (2x)
Full Thayer's lexicon entry
παραφρονέω — paraphronéō
παραφρονέω, παραφρόνω; (παράφρων (from παρά (which see IV. 2) and φρήν, 'beside one's wits')); to be beside oneself, out of one's senses, void of understanding, insane: 2Co 11:23. (From Aeschylus and Herodotus down; once in the Sept., Zec 7:11.)
1 occurrence