基地閉鎖[kichiheisa] (military) base closing
金鎖[kingusari] golden chain
鎖国[sakoku] national isolation
鎖骨[sakotsu] collarbone
鎖樋[kusaritoi] rain chain (hanging from a gutter and functioning as downspout, often made of ornamental cups)

再封鎖[saifuusa] reblocking
道路封鎖[dourofuusa] roadblock
封鎖[fuusa] blockade
鎖す[sasu] to shut

せん状骨[senjoukotsu] scaphoid bone (in wrist near thumb)
遺骨[ikotsu] remains
化骨[kakotsu] ossification
会厭軟骨[eennankotsu] epiglottis
がい骨[gaikotsu] skeleton

雁骨[kariganebone] scapula
気骨[kikotsu] (moral) backbone
侠骨[kyoukotsu] chivalrous spirit
胸骨[kyoukotsu] breastbone
筋骨[kinkotsu] muscles (sinews) and bones