tu prepararvi

to get ready, to prepare yourselves, to prepare for you

→ preparare
preparar to prepare, make ready + vi you (plural) clitic
verb · 2nd-person informal Rare #43,757
to get ready, to prepare yourselves The pronoun -vi makes the verb reflexive here.
IT: Dovete prepararvi prima di uscire.
EN: You need to get ready before going out.
to prepare for you Here vi means “for you,” rather than “yourselves.”
IT: Posso prepararvi un caffè?
EN: Can I make you a coffee?
Conjugation of preparare

Vi darò due ore per prepararvi.

I’ll give you two hours to get ready.

Posso prepararvi delle uova?

Can I make you some eggs?

Vi prego di prepararvi a consegnare Genesis al nostro arrivo.

Please prepare to hand Genesis over when we arrive.

— Star Trek II - L'ira di Khan (1982)

Dovreste prepararvi per il futuro.

You should prepare for the future.