"Six" or "You are" may be English equivalents of the Italian word sei.
Specifically, the Italian word can be either a number or a verb. As a number, it means "six". As a verb, it represents the informal second person singular (tu, "you") of the present indicative form of the infinitive essere ("to be").
Either way, the pronunciation will be "seh" in Italian.
Chi sei? in Italian is "Who are you?" in English.
Sei bella! in Italian means "You're beautiful!" in English.
Sei bravo! in Italian means "You're good" in English.
"Six" in English is sei in Italian.
sei li?
Perché sei arrabbiato? in Italian means "Why are you angry?" in English.
Tigrotta sei! in Italian means "You're a little tiger!" in English.
"You are horny!" in English is Sei arrapato! in Italian.
"You are special!" in English is Sei speciale! in Italian.
"Are you safe?" in English is Sei salvo? in Italian.
"You're in charge!" in English is Sei in carica! or Sei responsabile per...! in Italian.
Sei un cavallo! in Italian means "You're a horse!" in English.