to introduce / to lie between / between / shell / armor
介
=
人
+
丿
+
丨
:
Mnemonic symbol: 介 looks like a rocket 🚀. Neanderthal Man (人) and Joan of Arc (ji) are preparing a rocket (介) for its start. Between (介) the layers of the outer shell (介) they are stuffing bananas (丿) and dinosaur bones (丨).
于
=
亅
+
二
:
Mnemonic symbol: prepositions are what glue the sentence together. Honey is as sticky as glue, so I'll represent 于 by a honey jar.
Yu the Great was assigned to repair the electrics of the space station's entrance, but instead she was snacking some honey from a honey jar. Now her capacitor got stuck in the honey and she has to use a crowbar to lever it out.
(of time or place) in; at; on / (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for / (indicating a source) from; out of / (used in comparison) than / (used in the passive voice) by
two / both / some / a few / tael, unit of weight equal to 50 grams (modern) or 1⁄16 of a catty 斤[jin1] (old)
两
=
一
+
从
+
冂
:
Li Qingzhao is on a treasure hunt in the anglepod, following a secret map she found. Finally she found a treasure chest guarded by a rubber chicken which she has to overcome. Luckily, the map mentions a tune that Li Qingzhao plays on her flute, and thus bewitching the rubber chicken. The rubber chicken releases the treasure chest, which is full of taels of gold.
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.