Roadside (noun)

1. The land or area adjacent to a road or street.
2. The part of a road or street that is adjacent to a sidewalk.

Origin:

Roadside is a compound word, where "road" meaning a long hard surface built for vehicles to travel on and "side" meaning the edge or boundary of an area or object, so roadside refers to the edge or boundary of a road.

Examples:

1. The car broke down on the roadside.
2. I saw a beautiful flower on the roadside.
3. The roadside was littered with trash.
4. The roadside diner offered a good meal.
5. He was hit by a car while walking on the roadside.