The wind's howl and the booming reef came as a single ominous vowel, roaring, rising in pitch.

Thus, a single long vowel has two different phonetic realizations:

This word is often written with single vowels nearby the ideogram of the man.

After the consonant comes a single long or short vowel, which is sometimes followed by a single closing consonant.

A syllable is "light" if it ends in a single short vowel.

The use and abuse of a single vowel - "e" - also seems without precedent.

In the word button, both syllables are closed syllables because they contain single vowels followed by consonants.

A single short vowel rarely appears in syllable-final position.

In addition to single vowels (or monophthongs), Vietnamese has diphthongs and triphthongs.

There can never be multiple consecutive vowels in Swedish; they are always replaced with a single vowel.