This is the 1103rd most frequent French word.
arrière
"Arrière" means "rear" or "back" in English.
The word 'arrière' here denotes 'back' as a location within the context of the vehicle, indicating a spatial position.
Je suis assis à l'arrière de la voiture.
I am sitting in the back of the car.
In this case, 'arrière' is used figuratively to indicate 'back' in the sense of reflecting on past times.
Elle regarde souvent en arrière, se souvenant du passé.
She often looks back, remembering the past.
Here, 'arrière' connects to the idea of 'back' or 'reserve' in the context of having an additional option prepared.