(of liquid) to spill out; to overflow / (of gas) to leak out / (fig.) to spill over; to spread (to new areas) / (fig.) (of wealth etc) to drain; to flow outward (esp. overseas) / (fig.) (of talent) to show; to be revealed
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).