上锁

上锁	shàng suǒ	to lock; to be locked
上	shǎng	used in 上声
上	shàng	(bound form) up; upper; above; previous / first (of multiple parts) / to climb; to get onto; to go up / to attend (class or university) / (directional complement) up / (noun suffix) on; above
锁	suǒ	to lock; to lock up / a lock (CL:把)
锁	suǒ	old variant of 锁