Job 12:21 New English Translation

²¹He pours contempt on noblemen
and disarms^[a] the powerful.^[b]

Job 12:21 tn The expression in Hebrew uses מְזִיחַ (m^eziakh, “belt”) and the Piel verb רִפָּה (rippah, “to loosen”) so that “to loosen the belt of the mighty” would indicate “to disarm/incapacitate the mighty.” Others have opted to change the text: P. Joüon emends to read “forehead”—“he humbles the brow of the mighty.”
Job 12:21 tn The word אָפַק (ʾafaq, “to be strong”) is well-attested, and the form אָפִיק (ʾafiq) is a normal adjective formation. So a translation like “mighty” (KJV, NIV) or “powerful” is acceptable, and further emendations are unnecessary.

New English Translation (NET)