• 建物たてもの — building
• 建設けんせつ — construction
• 建築けんちく — architecture
• 再建さいけん — reconstruction
• 建国けんこく — founding a nation
• 建前たてまえ — official stance / facade

The kanji 建 combines a long stride radical (廴) with phonetic elements suggesting forward action. It came to mean establishing or setting up, from physical buildings to institutions or abstract systems.

新しい家いえを 建たてました。
We built a new house.

建設けんせつが 始はじまりました。
Construction has started.