deficiency / lack / scarce / vacant post / to run short of
缺
=
夬
+
缶
:
Cupid (qu) has almost all pottery pots (缶) of a collection of twelve, but the seventh piece is missing (缺). He asks a crystal ball (夬) I'm front of the elevator (e1): where is the missing piece? The crystal ball replies that he smashed it when he came back totally drunk the night before.