專制君主制

专 = 二 + ㇉ + ㇏ : Let's say the expert is a scientist. Also, 专 reminds me a little bit of the wheelchair symbol. Thus I choose a scientist in a wheelchair as symbol for 专.

专 = 二 + ㇉ + ㇏ : In front of the anthill, the scientist and Julian Giant Squid are focused on one thing: Electrifying the wheelchair of the scientist. Deeply concentrated they connect a capacitor to the wheelchair, which indeed starts to move a little.

制 = 牛 + 巾 + 刂 : James II of England (zh) and the bull (牛) have to work in a sweatshop in the space station's bathroom (Ø4) where they manufacture (制) one printed circuit board (制) after the other. Their only tools are kitchen knives (刂) with which they carve the boards. They sweat a lot, so each of them has a towel (巾) wrapped around their neck.

君 = 口 + 尹 : Mnemonic symbol: 马天君 (see example sentences).

In front of the encampment, 马天君, the system administrator and Zeus all share a mandarin.

主 = 丶 + 王 : Julian Giant Squid (zhu) is playing cards with Martin Luther King (王) in the space station (Ø3). It's Martin Luther King's turn, and he holds a petal (丶) in his hand high above his head: it's his trump card, and on it depicted is the Lord (主) himself.