大閘蟹

Big; large; great; vast; elder; eldest; important; profound; to a great extent; to emphasize; (dialect) father or uncle.

A sluice or flood gate for controlling water flow; a mechanism or device; to dam water; colloquially, a brake or electric switch.

Crab; a decapod crustacean with a broad, flat body and five pairs of legs, the first pair often forming pincers.