• 設計せっけい — design / planning
• 設備せつび — equipment / facilities
• 設定せってい — configuration / setup
• 設立せつりつ — establishment / founding
• 設置せっち — installation / establishment
• 設問せつもん — test question
• 設営せつえい — venue setup / layout
• 仮設かせつ — temporary setup

The left side is 言 (speech), linked to expression and dialogue. The right side 殳 (しゅ) represents action with a tool. Together, 設 conveys the act of deliberately creating or arranging — such as rules, buildings, or systems.

It’s widely used in administrative, technical, and infrastructural contexts.

この部屋へやには 冷房れいぼうが 設置せっちされています。
This room is equipped with air conditioning.

新あたらしい 会社かいしゃを 設立せつりつしました。
We established a new company.