Rebuilding, Reconstruction
noun, verbal noun
Again you build it. This is rebuilding. 再建 is a formal word that refers to the act of rebuilding something that has deteriorated or been lost, whether it's a physical structure like a building or an organization, or a part of the body in the context of medical procedures.
さいけん
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. Just don't forget that extra い!
これは国家再建をかけた一大プロジェクトです。
This is a major project aimed at national reconstruction.
このビルの再建には、まずは資金を作らなくてはいけません。
To rebuild this building, we will need to secure funding first.
今は被災地の再建が最優先です。
Rebuilding the disaster-stricken areas is top priority now.
潰れかかった会社を再建するまで、彼は毎日規定よりも長い時間働いた。
He worked longer hours than he was supposed to every day until he rebuilt his crumbling company.