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Greek Word Study
G3154
ματαιόω
mataióō
G3154 · Greek
to render (passively, become) foolish, i.e. (morally) wicked or (specially), idolatrous
Verses with this word
Romans 1:21
“Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imagina...”