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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Irish dulachán, from dubh (“black”) + another word (compare lucharachán (“elf, dwarf”)), possibly originally a term for a dark or sullen person (compare the surname Dullahan) and only subsequently applied to the spirit.
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Classic usage
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