万 = 丆 + ㇆ : As mnemonic symbol I choose a neuron, since each neuron is said to connect to 10000 others.

万 = 丆 + ㇆ : Willy Walrus needs to dig up the floor in the anthill's bathroom, but he is tired of doing so manually with a plough. To make his life easier, he sets up a wind wheel for electricity, connects a neuron to the wind wheel and the plough to transmit the electricity and uses his new DIY electric plough to dig much faster.

岁 = 夕 + 山 : Susan Saint Bernard (su) meets a bat (夕) in the bathroom of the Eiffel Tower (ei4). They make a bet: The one who is older (岁) will be allowed to eat the other using a fork (山).

恕 = 如 + 心 : Sheldon Shrimp (shu) broke Asif ibn Barkhiya's (如) heart (心) when he accidentally stepped on it in the space station's bathroom (Ø4), but Asif ibn Barkhiya is ready to forgive (恕) Sheldon.

罪 = 罒 + 非 : A terrible crime has been committed in the Eiffel Tower's bathroom: Zapatista Zebra lies dead on the floor, trapped in a fishing net. What has happened here? The answer may be saved on a negative which has been left carelessly on the floor. What has been photographed with this negative?

罪 = 罒 + 非 : A terrible crime has been committed in the Eiffel Tower's bathroom: Zapatista Zebra lies dead on the floor, trapped in a fishing net. What has happened here? The answer may be saved on a negative which has been left carelessly on the floor. What has been photographed with this negative?