Barrier

Obstacle that prevents or restricts passage or progress.

obstacle blockade fence wall

A barrier is an obstacle that prevents or restricts passage or progress. It can be physical, metaphorical, or conceptual.

/ˈbærɪər/

From Old French barrer 'to bar,' from Vulgar Latin *barrare* 'to shut in with a bar.'

A barrier is like a fence or wall that stops you from going somewhere, like how a guardrail prevents cars from driving off a road.

What is a barrier? It's something that blocks or restricts movement
What are some examples of barriers? Fences, walls, and even rules can be barriers
Can barriers be natural? Yes, mountains or rivers are examples of natural barriers

impediment hurdle restraint

obstacle structure

fence wall reef dam

system environment

artificial structure natural object