An archer's portable case for holding arrows. The word is recorded from Middle English, and is ultimately of West Germanic origin.
In British humorous usage, quiverful can mean a large number of offspring (originally with biblical allusion to Psalm 127:5, ‘Like as the arrows in the hand of the giant: even so are the young children. Happy is the man that hath his quiver full of them’).
an arrow in the quiver one of a number of resources or strategies that can be drawn on or followed.