do again; renew; redo; re-.
In English, the prefix "re-" denotes the idea of "again" or "repeated action". See the English translations of the examples
below.
Our house can't be repaired now because it is old now [and falling apart]; we must rebuild it.
If you have flowers, but you are not there to take care of them, when you arrive its appearance is already different. Well
then, you must plant again/replant.
If you have flowers, but you aren't home to take care of them, when you get back, the flowers are shot and you must replant.