To shut out, exclude, or prevent something from happening before it starts, often by creating an obstacle or prohibition in advance.
From 'fore-' (before) + 'bar' (to block or prevent). The term combines anticipatory prefix with the verb meaning to obstruct, creating the sense of prevention before action.
Medieval fortifications were essentially elaborate forebarring systems—everything from moats to gates was designed to block enemies before they even got close. The word is about stopping something in its tracks before it begins.
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