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Crossword clue: a diacritical mark (two dots) placed over a vowel to indicate a change in sound in some languages

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

umlaut 6 letters wn-def

a diacritical mark (two dots) placed over a vowel to indicate a change in sound in some languages

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Related clues

The euphonic modification of a root vowel sound by the influence of a, u, or especially i, in the syllable which formerly followed.