From an unused root meaning to twist, i.e. (by implication) be strong; the body (as being rolled together); also powerful -- mighty, strength.
H193. uwl
I. [אוּל] noun [masculine] body, belly; suffix אוּלָם (in contempt) Psalm 73:4 (literally their front, prominent part).
II. [אוּל] noun [masculine] leading man, noble; plural construct הָאָרֶץ אוּלֵי 2 Kings 24:15 Kt (Qr אֵילֵי see [III. איל]).