Construction
Constructing, Establishment
noun, verbal noun
You do the building to establish something. This whole process is called construction!
建設 is a pretty formal word for construction, focusing on the action or process of constructing rather than the structure itself. It’s often used for large construction projects, like malls, dams, or bridges. In some contexts, it can also refer to the establishment of significant entities, like a new state.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
パンテオンは、ローマ市内のマルス広場に建設されました。
The Pantheon was built in the Campus Martius in the city of Rome.
その空港、まだ建設中なの？本当に完成するのかな？
Is that airport still under construction? I wonder if it'll ever get finished.
ゴジラが破壊したビルは、だれが建設し直すの？
Who's gonna rebuild the buildings that Godzilla destroyed?