diphthonging
/ˈdɪfθɔŋɪŋ/
noun
- The process of pronouncing a vowel sound that glides from one vowel to another within the same syllable.
- Her accent features noticeable diphthonging, making 'time' sound like 'toim'.
- The diphthonging in the word 'coin' combines an 'oh' and 'ee' sound.
- Linguistics students studied the diphthonging of vowels in different English dialects.