This is the 544th most frequent French word.
rendez
"Rendez" is the second person plural (or formal singular) imperative form of "rendre," meaning "give back" or "return."
The word "rendez" here is the indicative present tense form of "rendre" conjugated for 'vous,' used in the expression 'rendre visite,' meaning 'to visit.'
Vous rendez visite à vos amis chaque mois.
You visit your friends every month.
The word "rendez" here is the imperative form of the verb "rendre," meaning 'return' or 'give back,' addressed formally or plurally.
Rendez-moi mes livres, s'il vous plaît.
Give me back my books, please.
The word "rend" (without -ez) is the conjugated present indicative form for 'il/elle/on' of the verb 'rendre,' used here to mean 'makes' or 'causes to be.'