This is the 335th most frequent Hungarian word.
kezdte
"Kezdte" means "started" or "began" (past tense, third person singular).
The word 'kezdte' indicates that he initiated or began the action of talking.
Ő kezdte a beszélgetést.
He started the conversation.
Here, 'kezdett' is used in a context to refer to the commencement of an enterprise or organized effort.
A cég egy új projektet kezdett, melyben sokan dolgoznak.
The company started a new project in which many are working.
The word 'kezdte' in this sentence conveys the initiation of a dance act by Maria.