medicine chest; medicine container
Refers to a physical container for storing medicines, such as a chest, box, or case. Not a modern first-aid kit; more traditional or literary.
There is an old medicine chest in my grandfather's room.
something always at hand; someone at one's beck and call; complete mastery over something
complete mastery; at one's beck and call
Compound of 薬 (medicine) and 籠 (basket/container). The exact historical derivation is uncertain, but the spelling is conventionally associated with a container for medicines.