"Metella and Quintus [proper names] are dead."
"They were assembled."
sunt is the 3rd pers plural, present indicative of esse - (they) are
sunt viae in terris Europae = They are in the streets of the land of Europe.
It can be translated like: "there are or there are not" Example: Suntne multī fluviī? - are there many rivers?
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
pacta sunt sevanda , means in contract law means "the contract has to be respected" whatever the contract agreement is
There are such things
These three are one.
sunt = are
I believe that is Latin for These are the men of the day.
Puellae sunt filiae reginae.
In virtue there are many advantages.