语言学家

语 = 吾 + 讠 : Yu the Great is seeing some language advertisement on an advertising column in the space station. She decides to paint a big mandarin colored pentagram over the language ad.

言 = 亠 + 二 + 口 : The horizontal lines look like sound waves that emerge from an opening: I'll resemble 言 by a megaphone.

言 = 亠 + 二 + 口 : Maud Younger rushes into anthill and in the kitchen she uses a megaphone to loudly announce that the world revolution will soon start. She also tells the people that she has berets for everyone so that everyone will be able to be in style for the revolution. However she doesn't tell that she prepared the berets in another way: to each beret, she attached a mandarin via two capacitors which forms a formidable antenna, so that after the revolution, she'll be able to transmit her speeches directly to the wearers' brains.

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.

家 = 宀 + 豕 : Mnemonic symbol: a framed "home sweet home" picture.

The swine (豕) graduated and wearing a graduation cap (宀), it came home to the ashram. In front of it (a1), Joan of Arc (ji) welcomes the swine and hugs it. To welcome her dear swine, she put a gigantic home sweet home (家) picture in front of the ashram.