A fish or a term used in some dialects to describe a type of waterfowl or small aquatic creature.
Possibly dialectal or onomatopoetic in origin, with unclear etymology. May be related to Middle English or Old English words for fish, but its precise origins are disputed.
Some words are etymology's mysteries—'gish' appears in historical texts but has such murky origins that even scholars can't agree on where it came from.
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