A dialectal variant or diminutive of 'eel,' used in regional English speech.
From Old English 'æl' (eel) with a diminutive suffix '-ick,' similar to how 'haddock' contains the suffix '-ock.' Regional English formation.
Ellick is a tiny word for a tiny creature—it shows how English speakers used diminutive suffixes (-ick, -ock, -ling) to make everything sound smaller and more affectionate, even fish got the cutesy treatment!
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