植牙

植 = 木 + 直 : James II of England (zh) decided to go straight-edge (直), so he buried all his drugs in a hole in the space station's kitchen (Ø2) and, as a sign for his new beginning, plants (植) a Christmas tree (木) on top of it.

Mnemonic symbol: wisdom tooth. Maud Younger has a wisdom tooth removed just inside the ashram's kitchen.