An obsolete or dialect word, possibly referring to a type of coin, payment, or a dialectal variant; its meaning is highly uncertain.
The etymology is extremely unclear. It may be a corruption or abbreviation of an older word, or a regional variant. It appears so rarely in historical texts that its origin is essentially lost.
Ady is the kind of word that makes etymologists want to tear their hair out—it appears just often enough in old texts to know it's real, but rarely enough that its meaning is essentially lost forever.
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