Greek word
mataióō
ματαιόω
What it means
to render foolish, i.e. wicked or, idolatrous
to render (passively, become) foolish, i.e. (morally) wicked or (specially), idolatrous
Where it comes from
from mátaios (μάταιος)
How the King James translates it
Every place it appears 1
Romans1:21