制 is built from the 生, 巾 (cloth), and 刂 (knife (right)) components.
It reads セイ like 生, as do 性, 星, 牲, and 姓 — learn 生 once and the family's reading comes with it.
A common word using 制 is 制限 (せいげん), meaning “restriction, restraint, limitation”.
Don't confuse it with 刺, 製, and 刻.
