This is the 14583rd most frequent Polish word.
przygotował
"Przygotował" means "prepared" (past tense, masculine singular).
In this sentence, 'przygotował' is used to indicate that Jan has completed the action of preparing or cooking dinner.
Jan przygotował obiad dla całej rodziny.
John prepared dinner for the entire family.
Here, 'przygotował' is utilized to express that the teacher has organized and assembled educational materials in advance.
Nauczyciel przygotował materiały dla uczniów.
The teacher prepared materials for the students.
In this context, 'przygotował' is part of the reflexive verb 'przygotował się,' which means the team made themselves ready for the game.