An obscure or archaic term with uncertain etymology, possibly referring to a place name or historical designation.
The origin of this word is unclear and may be from Old English or a place-name variant. It appears rarely in historical documents and its meaning has been largely lost to time.
Many words like amsath exist in dictionaries as 'ghost words'—entries that slip in from typos or misreadings and then get copied forward by lexicographers for centuries!
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