κατάνυξις G2659
katányxis · kat-an'-oox-is · Noun Feminine
from κατανύσσω; a prickling (sensation, as of the limbs asleep), i.e. (by implication, (perhaps by some confusion with νεύω or even with νύξ)) stupor (lethargy):--slumber.
1 Occurrence in the King James Bible
Romans 11:8(According as it is written, God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day.