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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Origin uncertain. Either from gull (“to dupe, trick, fool”) + -ible; or alternatively from Middle English gole, goll, gol (“an unfledged bird, silly fellow”), perhaps from Old Norse gulr (“yellow, pale”), from the hue of its down.
fleeceable, green
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Classic usage
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