Assertion: english diphthong | /r/CapableOf | originate as monophthong
Facets:
value: mostly
type: DEGREE
value: historically
type: TEMPORAL
Source sentences:
text: As an example, the English diphthongs are usually considered single phonemes because they (mostly) originated historically as monophthongs, alternate with monophthongs in pairs such as divine vs. divinity, maintain their coherence when another vowel follows, and other, similar-looking diphthongs like [/eu/] do not exist in the language.[citation needed]