ματαιόω mataióō

Meaning

to render (passively, become) foolish, i.e. (morally) wicked or (specially), idolatrous

In the King James Version: become vain

Derivation: from G3152 (μάταιος);

Where it is used

• Romans 1:21 For although they knew God, they neither glorified Him as God nor gave thanks to Him, but they became futile in their thinking and darkened in their foolish hearts.