楗

Noun: A wooden door-bar or bolt (a long piece of wood used to secure an opening by sliding it into place).

Verb: To bar a door; to secure or lock an entrance using such a bolt.

Semantic Extensions: May be used metaphorically regarding closure, seclusion, or the definitive shutting out of external access.

This glyph frequently alternates between noun (the hardware) and verb (the action of securing); context must determine whether it refers to the object or the act.

Often interchangeable with 閂 (shuān). 楗 may appear more frequently in archaic contexts or specifically regarding the sliding beam itself.

When translating as "lock" or "locked," note that this refers to a mechanism of gravity and friction (a beam in a notch) rather than a keyed lock. The action is one of sliding and obstruction.