困难

困 = 囗 + 木 : Mnemonic symbol: a sleeping bag.

Karl Koala has been putting Christmas trees into boxes all day, and now he is very tired. He climbs one of the Christmas trees he already put into a box, slips into his sleeping bag and falls asleep on the tree.

困 = 囗 + 木 : New mnemonic symbol to avoid confusion with 夗: sleeping pills.

困 = 囗 + 木 : Mnemonic symbol: a sleeping bag.

Karl Koala has been putting Christmas trees into boxes all day, and now he is very tired. He climbs one of the Christmas trees he already put into a box, slips into his sleeping bag and falls asleep on the tree.

困 = 囗 + 木 : New mnemonic symbol to avoid confusion with 夗: sleeping pills.

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.