This is the 2133rd most frequent Arabic word.
قريب
Close; near.
The word "قريب" functions as an adjective here, meaning "close" and describes the proximity of the house to the school.
البيت قريب من المدرسة.
The house is close to the school.
The word "قريب" is used adverbially here to mean "close to" indicating an approximate comparison in speed between the car and the airplane.
السيارة تسير بسرعة قريب من سرعة الطائرة.
The car is moving at a speed close to the speed of the airplane.
In this sentence, "قريب" is used as a noun to mean "relative," signifying family relation in the context.