chain, irons, connection
鎖 centers on linking things together with a physical restraint: a chain, irons, or a connection that binds.
鎖 combines 金 (metal) with a phonetic component that originally depicted small shells or pieces, suggesting metal links or a chain.
The left side 金 (metal) hints at the material, and the right side looks like a series of linked items (⺌ over 貝). Picture a metal chain made of small connected pieces.
For サ, imagine a chain made of metal links that clink with a sharp 'sa' sound when shaken: sa -> サ.
closing; closure
chain; chains
blockade; lockdown; sealing off (an area)
chain; series; connection
collarbone; clavicle
national isolation; closing the country (to foreigners)
sickle and chain (weapon)
asp viper (Vipera aspis)
silent chain
data chaining
isolation paradise (esp. unique products without foreign competition)
Streptococcus viridans
block chaining
polymerase chain reaction; PCR
Markov chain
Markov chain Monte Carlo methods; MCMC methods
European adder (Vipera berus)
Russell's viper (Daboia russelii)
temporary closure
Ninja weighted chain weapon