An alternate spelling or regional variant of garoo, possibly referring to a sturdy horse or similar work animal.
Likely a variant or dialectal form related to garron or similar terms for working animals, though its exact etymology is uncertain. It appears in some regional or historical texts with unclear derivation.
Some words are mysterious because they're so specialized to one region or time period that records are sparse—garroo might be one of those 'lost' words that farmers used but never made it into most dictionaries.
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