This is the 5086th most frequent Japanese word.
設
"設" means "establish," "set up," or "equip."
The word "設" appears in the verb "設計" (design), indicating the action of planning or designing with a specific purpose.
この建物は、安全な構造に設計されています。
This building is designed with a safe structure.
Here, "設" is used in "設置" (installation), referring to the action of physically setting something up or installing it.
私たちは、そのデバイスの新しい設置方法を学びました。
We learned the new installation method for the device.
In this sentence, "設" is part of "設立" (establishment), which relates to the creation or founding of an entity like a company.