This is the 3rd most frequent Romanian word.
și
"And".
In this usage, 'și' means 'also' and indicates an addition to a previously mentioned idea.
Ea are și un câine mic.
She also has a small dog.
In this sentence, 'și' is used as a conjunction meaning 'and', joining two subjects.
Ana și Maria merg la magazin.
Ana and Maria go to the store.
Here, 'și' connects two actions, suggesting the simultaneous or sequential nature of the actions.