gwyach fawr gopog

== Welsh == === Etymology === From gwyach (“grebe”) +‎ mawr (“great”) +‎ copog (“crested”). === Noun === gwyach fawr gopog f (plural gwyachod mawr copog) great crested grebe (Podiceps cristatus) ==== Synonyms ==== gwyach gopog dowciar Wil y wawch gwawch tindroed gwyach gorniog (more usually refers to a horned grebe) === Mutation === === References ===