It can be added before nouns or verbs to form new nouns or verbs.
It means going back or going backwards. For example, return, recall, recall.
It means again and again. For example, review reunion, restart reconstruction.
Express opposition and opposition. For example, rebel reverse resist.
It means "more" and is used for emphasis. This usage is relatively rare. For example, "recommendation" and "recommendation" have the same meaning, but the tone is stronger.