double / twice / simultaneous / holding two or more (official) posts at the same time
兼
=
秝
+
肀
:
Mnemonic symbol: a double. Joan of Arc (ji) and her stunt double (兼) are eating two bowls of cereals (秝) while the real Joan of Arc signs autographs with her crayon (肀) in front of the anthill (an1).
备
=
夂
+
田
:
Beelzebub prepared a field of high heels in the Eiffel Tower's bathroom. He wants to shock any person entering the bathroom with society's expectations towards what people should wear on their feet.