另
=
力
+
口
:
Mnemonic symbol: to separate two liquids, one can use a distiller.
In engine's bathroom ((e)ng4) Li Qingzhao (li) wants to distill a liquor (另) out of mandarins (口). She puts the mandarins in the distiller and hits the power button (力).
外
=
夕
+
卜
:
There's a hole in the wall of the airplane's bathroom (ai4), and from outside (外), a bat (夕) wants to enter. Willy Walrus (w) is very afraid of bats, so he does his best to hinder the bat from entering with a voodoo staff (卜).