lame

A thin metal plate, especially one of the overlapping steel plates in medieval armor.

Disabled so that movement, especially walking, is difficult or impossible.

Marked by pain or rigidness.

Weak or ineffectual.

Dull or unsatisfactory.

Socially inappropriate; foolish.

To cause to become lame; cripple.

To make lame; cripple or disable; render imperfect or unsound: as, to lame an antagonist; to lame an arm or a leg.

In armor, a plate of metal.