The nasal cluster has equally prominent vowels in primary-stressed mid-toned syllables while in closed syllables and unstressed the second vowel is extremely short.
42.
And are derived from the Classical Arabic diphthongs and, respectively, when occurring in closed syllables ( i . e . not followed by a vowel ).
43.
The short monophthongs exhibit allophonic changes as well . and are raised to and respectively when followed by a long consonant, / i / becomes in closed syllables.
44.
This ended the era of " syllabic synharmony " ( when most, originally all, syllables were open ) by creating large numbers of closed syllables.
45.
According to Melchert, the lengthening of accented short vowels in open syllables cannot be Proto-Anatolian, and the same goes for lengthening in accented closed syllables.
46.
It can usually be recognised that there is a short plosive in a closed syllable, implying that it must be the weak grade of an originally long consonant.
47.
Generally this led to a situation where both and occur allophonically, with the high-mid vowels in open syllables and the low-mid vowels in closed syllables.
48.
In closed syllables, where Atong vowels would be pronounced lowered and more retracted, the loan vowels will have the same quality as the Atong vowels in open syllables.
49.
During the Common Slavic period, a tendency known as the " law of open syllables " led to a series of changes that completely eliminated closed syllables.
50.
It is important to keep in mind that consonants in this case include length; a CV : syllable is not an open syllable, but a bimoraic closed syllable.
