From the same as 'eviyl; silliness -- folly, foolishly(-ness).
see HEBREW 'eviyl
H200. ivveleth
אִוֶּ֫לֶת25 noun feminine folly. — absolute Proverbs 12:23 +; construct 14:8 +; suffix אִוַּלְתִּי Psalm 38:6, etc.; — folly, special product of כְּסִילִים (see כֶּסֶל) Proverbs 12:23 + (12 t.); with מְּתָאִים 14:18; with אֱוִלִיים only 16:22; 27:22 for alliteration. It is bound up in mind of boy, to be removed only by rod of discipline 22:15; ׳א personified tears down house built by נָשִׁים חַכְמוֺת 14:1; it is contrasted with תְּבוּנָה 14:29; 15:21.
II. איל אול, (be in front of, precede, lead; see Thes NöMBA 1880, 774; SBA 1882, 1175, who compare Arabic for , אוולא ᵑ7; compare Sabean אול DHMEpigr. Denkm. 33. 34; see on the other hand LagOr ii. p. 3; M i. p.100 & below I. אלה below) **Arabic , etc., from , see Lane.