To cause harm to a benefactor (especially one that one is dependent on, thus with the idea that this behaviour is self-damaging).
A reef, shoal or sandbar.
The part of a repository where shelvesets are stored.
A projecting ledge that resembles such an object.
A flat, rigid structure, fixed at right angles to a wall or forming a part of a cabinet, desk etc., and used to support, store or display objects.
The capacity of such an object