Meaning

noun a vowel whose quality or length is changed to indicate linguistic distinctions (such as sing sang sung song)

originEtymology tree Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Germanic *ab Old High German ab Middle High German ab German ab German ab- Proto-Indo-European *ḱlew- Proto-Indo-European *-tós Proto-Indo-European *ḱlutós Proto-Germanic *hlūdaz Proto-West Germanic *hlūd Old High German lūt Middle High German lūt German Laut German Ablautbor. English ablaut Borrowed…

Etymology from Wiktionary, CC BY-SA 3.0