KanjiJLPT N4
System

system, law, rule

Mnemonic

A cow stands on an assembly line, a towel draped over its eyes so it can't see the knife ahead. This is the system — every cow processed the same way, towel blinding, knife waiting. The system is ruthless but efficient.
Additional thoughts
Visualize the cold factory floor: cow enters, towel blindfolds it, knife processes it. The system is the mechanical order governing every step. Cow = subject under control, Towel = restraint, Knife = enforcement tool.
Quick recall
A cow blindfolded by a towel marches toward the knife — that's the system.

Details

The keyword for 制 is system. This kanji conveys the idea of establishing order, regulations, or a structured framework for governing or controlling something. It encompasses meanings related to creating rules, institutions, and organized methods that regulate how things function. By extension, it also carries the sense of restraining or suppressing, as a system inherently imposes limits and structure on what would otherwise be uncontrolled.
On'yomi
せい

Used in kanji