sunt = are
Cine sunt eu? in Romanian is "Who am I?" in English.
I assume you mean Sunt hostes mei which means are my enemies. The full Biblical (Psalm 3:1) verse is Domine quare multiplicati sunt hostes mei which means Lord, how my enemies have increased
I am bored.
Cornelia and Flavia are roman girls in Italia
Felices sunt means "are happy" or "are fortunate." I don't know, though, what vertutes are.
"They were assembled."
The dogs are in the street.
The slaves are in the street
sunt is the 3rd pers plural, present indicative of esse - (they) are
It can be translated like: "there are or there are not" Example: Suntne multī fluviī? - are there many rivers?
pacta sunt sevanda , means in contract law means "the contract has to be respected" whatever the contract agreement is