Strong G4654 σκοτίζω skotizō · to darken

Romans

1. Romans 1:21
   Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
2. Romans 11:10
   Let their eyes be darkened, that they may not see, and bow down their back alway.