barrier
UK: ˈbæriə | US: ˈbæriər
n. a physical or abstract obstacle that prevents movement or progress
n. a boundary or limit, especially in a competition or race
n. (ecology) a natural feature that separates ecosystems or populations
The word "barrier" traces back to Old French barriere, derived from barre (meaning "beam" or "obstacle"), which itself comes from Vulgar Latin barra (a rod or barrier). The suffix -ier was used to form nouns indicating objects or tools. Originally referring to a physical bar or gate, the term evolved metaphorically to denote any impediment or boundary, reflecting its logic of "blocking passage."
The Great Wall of China was built as a defensive barrier against invasions.
Language can sometimes be a barrier to effective communication.
The runner broke the finish-line barrier in record time.
Coral reefs act as natural barriers protecting coastlines from storms.
The new policy aims to remove barriers to employment for marginalized groups.