This is the 7564th most frequent French word.
quittera
"Quittera" means "will leave."
In this sentence, "quittera" is used in the future tense (third person singular) to indicate the action of leaving or departing from a location in the future.
Elle quittera la maison demain matin.
She will leave the house tomorrow morning.
Here, "quittera" conveys the act of resigning or leaving a position or place in a planned manner in the future.
Il quittera son travail pour poursuivre ses rêves.
He will leave his job to pursue his dreams.
Though plural here ("quitteront"), the construction is similar to the singular forms, denoting a planned departure at a specified future time.