urgent / pressing / rapid / hurried / worried / to make (sb) anxious
急
=
刍
+
心
:
Joan of Arc just arrived at the space station and although she has to go to the bathroom very urgently, she first has to clear the way of a big fluffy heart using a lawn mower.
difficult (to...) / problem / difficulty / difficult / not good
难
=
又
+
隹
:
Mnemonic symbol: a video game which is almost impossible to beat.
难
=
又
+
隹
:
Just inside the anthill's kitchen, Napoleon and a sparrow are trying to beat an insanely difficult video game. After playing and failing all day long Napoleon finally loses his temper and crashes the game wearing two boxing gloves.