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barrier
The word carries a strong sense of separation and exclusion. It describes a hard line that must be crossed, broken, or bypassed to reach a goal. While a wall is a static object, a barrier often implies a functional purpose, such as security, safety, or a systemic restriction.
In social or psychological contexts, it suggests a feeling of invisibility or frustration, where the obstacle is not a physical wall but a rule, a prejudice, or a lack of skill that keeps two parties apart. It is frequently used in professional settings to describe gaps in communication or efficiency.
Countable when referring to specific physical fences or distinct social obstacles like a language barrier.
Meanings
Examples
The police set up a barrier to block the road.
Language differences can be a significant barrier to employment.
Collocations & Compounds
crash barrier
Noun collocation: a sturdy fence or rail at the side of a road to prevent vehicles from leaving the road
trade barrier
Noun collocation: a government-imposed restraint on the import or export of goods
break down barriers
Verb collocation: to remove obstacles or prejudices that prevent communication or progress
sound barrier
Noun collocation: the speed at which sound waves travel, which must be exceeded for supersonic flight
Etymology
Derived from Old French 'barriere', meaning a barrier or gate, which stems from 'barre' (a bar or bolt). This further traces back to Vulgar Latin 'barra', referring to a piece of wood or metal used as a bolt or obstruction. The semantic evolution moved from a literal physical bar used to block a door or gate to the broader sense of any physical or metaphorical obstruction.