Lei offendervi

to offend you

→ offendere
offend to offend, to insult + er Infinitive + vi you (formal)
verb · 2nd-person formal Rare #43,642
to offend you Here, vi means “you” when speaking to more than one person or formally to one person.
IT: Non voglio offendervi.
EN: I don't want to offend you.
Conjugation of offendere

Se dovessi offendervi, mi scuso in anticipo; non è mia intenzione.

If I happen to offend you, I apologize in advance; that’s not my intention.

Io non avevo intenzione di offendervi.

I didn’t mean to offend you.

Non voglio offendervi.

I don't want to offend you.

Non avevo intenzione di offendervi.

I didn't mean to offend you.