To annul or undo an augury or religious consecration; to desecrate or profane.
From Latin ex- (out/away) + augurare (to prophesy, from augur). In Roman religion, auguration was the practice of interpreting omens; exauguration was the formal reversal of this sacred act.
Roman augurs were like sacred fortune-tellers, and exaugurate meant to literally undo their prophecies or cancel the sacred power of a place. It's a ritual eraser button from the ancient world.
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