Rebuilding
Reconstruction
noun, verbal noun
Again you build it. This is rebuilding.
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.