'Fast' in the Bible

who such a charge having received, did put them to the inner prison, and their feet made fast in the stocks.

And much time being spent, and the sailing being now dangerous -- because of the fast also being already past -- Paul was admonishing,

and having fallen into a place of two seas, they ran the ship aground, and the fore-part, indeed, having stuck fast, did remain immoveable, but the hinder-part was broken by the violence of the waves.