This is the 1695th most frequent Polish word.
przygotowuje
"Przygotowuje" means "prepares" in English.
The word 'przygotowuje' is used here to indicate the action of preparing something currently, in this case, dinner for the family.
On przygotowuje kolację dla rodziny.
He is preparing dinner for the family.
The word 'przygotowuje' is used reflexively here to mean preparing oneself, specifically for an event or activity like an exam.
Ona przygotowuje się do egzaminu z historii.
She is preparing herself for the history exam.
Here, 'przygotowuje' indicates the action of preparing a material, like a presentation, for a specific purpose such as a lesson.