Origin: French suffix -ier
Barrier has 6 different meanings across 2 categories:
a structure or object that impedes free movement
"The heavy wooden barrier blocked access to the construction site, preventing anyone from passing through without permission."
anything serving to maintain separation by obstructing vision or access
"The tall hedge acted as a barrier that completely blocked our view of the neighbor's garden."
A structure that bars passage.
"The sturdy wooden barrier prevented anyone from crossing the river during high water."
In plain English: A barrier is something that blocks your way and stops you from getting to where you want to go.
"The new fence acts as a barrier to keep people out of the garden."
To block or obstruct with a barrier.
"The protesters erected a wall to bar all vehicles from entering the park."
In plain English: To barrier something means to block it so that nothing can get through.
"The heavy fog acted as a barrier to our progress on the highway."
A surname, from French.
"The genealogist traced Barrier's lineage back to a noble family bearing that distinctive French surname."
The word barrier entered English through the phrase "iron bars," which was used to describe a fence made of iron. It traveled into Middle English as baryere before becoming our modern term for an obstacle or boundary.