In most contemporary dialects, it's a diphthong with a high front off-glide, so you might take it as mixed on the hot-or-not dimension, but ‘a front vowel sound’ it is definitely not.
However, all subsequent authors except Meek have used the diphthong , so Archaeocyathus is now treated as a justified emendation of Billings' original spelling.
This was adopted into English and subjected to the normal sound-changes of the late medieval and early modern period: the final - e ceased to be pronounced and the long i became a diphthong .
For these speakers, the diphthong in fife starts out near the vowel of bud, and ends near the vowel of bade; while the diphthong in five starts near the vowel of hod, and ends nears the vowel of hed.
Our role model was our head teacher, Miss Osborne, known as the High Mistress, who flapped about the place in her gown and lapsed into classical Greek pronunciation whenever she used a diphthong .
All Australian accents are regional, and the elongated diphthong , particularly the ‘ooo’, is the immediate giveaway for New South Welshpersons.
For example, there is no attempt to distinguish between the ‘pure’ O of Italian and the diphthongal O of British English, or between the various R sounds of English, French, Spanish, and German.
Similarly, a study of Tunisian women in Morocco showed that older women categorically use diphthongs /aw/and/aj /, while middle-aged women alternate between diphthongs and monophthongs.
Like U.S. Spanish, early Spanish exhibited a strong tendency to form diphthongs from contiguous vowels.
Density is thus largely a function of word stock and reflects at this stage in Coolidge's work an affinity for monosyllabic words, particularly those that couple long vowels or diphthongs with consonant blends.