On and ousia are only ion with an iota broken off; and ouk on is ouk ion.
He doesn't spare the horror of the thing one iota, but it "gets one right."
One would not detract an iota from the achievements of these gallant adventurers.
She should not, however, permit herself to fail in one iota of her duty.
It was on the Wednesday night that the Iota crossed to Etretat.