落锁

落锁	luò suǒ	(of a gate, vehicle etc) to lock; to engage the lock
落	là	to leave out / to be missing / to leave behind or forget to bring / to lag or fall behind
落	lào	colloquial reading for 落 in certain compounds
落	luò	to fall or drop / (of the sun) to set / (of a tide) to go out / to lower / to decline or sink / to lag or fall behind / to fall onto / to rest with / to get or receive / to write down / whereabouts / settlement
锁	suǒ	to lock; to lock up / a lock (CL:把)
锁	suǒ	old variant of 锁