A centering diphthong is one that begins with a more peripheral vowel and ends with a more central one, such as , , and in Received Pronunciation or and in Irish. Many centering diphthongs are also opening diphthongs (, ).
A centering diphthong is one that begins with a more peripheral vowel and ends with a more central one, such as  , and in Received Pronunciation or and in Irish Many centering diphthongs are also opening diphthongs ( ).