建设
jiànshè · HSK 3
construction
🏗️ 建 = build/construct + 设 = set up/establish
建 means to build or construct (think 建筑 building); 设 means to set up or establish (as in 设计 design). Together 建设 = the act of building and establishing — construction, often of infrastructure or large-scale projects.
建 — 廴 (stride radical) + 聿 (writing brush)
Originally depicted a hand holding a brush (聿) combined with the 廴 'stride/extend' radical, suggesting drawing out or laying down lines. From this came the meaning of setting up or establishing, as in marking out the foundations of a building. Today it broadly means to build, establish, or construct.
设 — speech 讠 + hand holding tool 殳
设 combines 讠 (speech) with 殳 (a hand wielding a tool or weapon), suggesting giving orders to set something up. The original sense was to arrange or establish through command, which extended to today's meanings of 'set up,' 'design,' or 'suppose.'