[סָכַל] verb be foolish, or a fool, usually in moral or spititual sense (Syriac Aph`el act foolishly; foolish, etc., ᵑ7 סְכַל derived species, act foolishly; סַכְלָא fool; Christian-Palestinian Aramaic , Aph`el = ἁμαρτάνω, also derivatives Schw^{Idioticon 62}; Assyrian saklu, perhaps foolish, Dl^{HWB 498}; Aramaic סְכַל know, be intelligent, cause to understand, etc. (derived species), compare שׂכל; Mei^{Chrest. Targ.} derives both these opposite meanings from Arabic form, likeness. Gerber¹⁷⁸ thinks Hebrew verb denominative); —

Piel Imperfect יְסַכֵּל Isaiah 44:25, Imperative סַכֶּלנָֿא 2 Samuel 15:31, make foolish, turn into foolishness.

Niph`al Perfect2masculine singular נִסְכַּלְתָּ2Chronicles 16:9; נִסְכָּ֑לְתָּ 1 Samuel 13:13; 1singular נִסְכַּלְתִּי 2 Samuel 24:10 = 1 Chronicles 21:8, act or do foolishly.

Hiph`il Perfect2masculine singular הִסְכַּלְתָּ Genesis 31:28 (E), 1 singular הִסְכַּלְתִּי 1 Samuel 26:21, do foolishly, play the fool.