Tuo is an Italian equivalent of the Latin word tuus.
Specifically, the word functions as an adjective in its masculine singular form. It means "(informal singular) your." The respective pronunciation will be "TOO-o" in Italian and "TOO-uhss" in Latin.
tuus=your
"Tuus filius." (Note: Here I have translated it "your son," but it means the same thing.)
Latin for your or yours is "tuus".
Tuus means "yours".
Tuus
Tuus pater.
tuus infantus
Tuus amor.
Tuus canis.
Pater tuus.
Vivere in Italian and Latin means "to live" in English.
You say 'Tuus rex est.'