a chain

a chain, to link together / to close off, block

(pitch 0) a metal bar used to lock shut a gate, door, chest, or other opening / (pitch 0) a key used to lock or unlock such an opening / (pitch 1) a pill or tablet

a connection, linkage, or continuation / (rare) a chain / a string of items tied together / the part of the opening of a drawstring bag through which the string is passed

counter for pills or tablets

the closing and locking of a door or gate / a door or gate so closed and locked / a bar or other device used to lock a door or gate

a chain, linkage, or continuation / a lock or barrier

(medicine) imperforate anus

Japanese chainmail armour, used by the samurai class and their retainers in feudal Japan.

Kyūjitai form of 鎖国 (“national isolation”)