Icelandic

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Etymology

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From æður (eider) +‎ dúnn (down).

Noun

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æðardúnn m (genitive singular æðardúns, no plural)

  1. eiderdown

Declension

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    Declension of æðardúnn
m-s1 singular
indefinite definite
nominative æðardúnn æðardúnninn
accusative æðardún æðardúninn
dative æðardúni æðardúninum
genitive æðardúns æðardúnsins