augur | auger

(1) A sign of an event that is to come is an augur,
(2) a tool used for boring is an auger.

Etymology -

(1) The word augur derives from the Latin augur, the title of a Roman religious official whose role was to publicly interpret omens.
(2) The word auger was coined by the faulty separation of the Middle English phrase a nauger into an auger; the former derives from the Old English nafogar, nave drill.

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