mortise lock

lock that is fitted inside a hole cut into the edge of a door, not one that is screwed onto the surface （嵌入门里的）暗锁.

morris dancer, morris dancer., morrow, Morse, morsel, mortal, mortal sin, mortality, mortality table, mortally, mortar, mortar-board, mortgage, mortgagee, mortgager, mortgagor, mortician, mortification, mortify, mortise (also mortice), mortuary, mosaic, Moscow, moselle, mosey, Moslem, mosque, mosquito, mosquito-net, moss, moss-grown, mossback, mossy, most, mostly, MOT, mote, motel, motet, moth,