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).
to store up / to grow (e.g. a beard) / to entertain (ideas)
蓄
=
艹
+
畜
:
Xu Xian (xu) is storing up (蓄) herds of cows (畜) in the space station's bathroom (Ø4). Each herd is living on a sheet of artificial lawn (艹) and when he gets a new herd, he just adds another layer on top.