ASL sign for SEIZE

To grasp suddenly and forcibly; to take or grab by force.

A classifier handshape may be appropriately modified in some sentences. For example, the video shows a "C" handshape to refer to seizing a person by arm or something of similar size. The other video with "S" handshape may be referred to seizing a purse strap, etc.

To take (an opportunity or initiative) eagerly and decisively.