revidi

The prefix re- means once more or back again, so vidi gives revidi at no extra cost, exactly as veni gives reveni and iri gives reiri. Its most useful outing is the noun: ĝis la revido is the everyday goodbye, literally until the seeing-again, and it is what you will hear at the end of every meeting and every congress. Shortened to ĝis it becomes casual, roughly see you. Note that revidi keeps a direct object with -n, since the prefix changes the timing of the verb, not its grammar.