閉鎖【へいさ】
closing, closure, shutdown, lockout
封鎖【ふうさ】
blockade, lockdown, sealing off (an area), freezing (funds)
鎖国【さこく】
national isolation, closing the country (to foreigners), sakoku, policy of national isolation enacted by the Tokugawa shogunate
連鎖【れんさ】
chain, series, connection, linkage
経済封鎖【けいざいふうさ】
economic blockade, embargo
連鎖反応【れんさはんのう】
chain reaction, nuclear chain reaction
鎖骨【さこつ】
collarbone, clavicle