"Socii vestri sunt ignavi."

Translation: Your allies are lazy.

[Ternom98]

Sociī vestrī sunt ignāvī. /u-/--/-/---/

[MartinHarm18]

is that genative ? , your (belonging to you)

[Moopish]

Vestri here is not genitive but the nominative plural of the possessive adjective vester.

[MartinHarm18]

Ah yes I see now, thank you.