information:extraction, stylistic:style_transfer
Nucleus

The nucleus is usually the vowel in the middle of a syllable. Generally, every syllable requires a nucleus (sometimes called the peak), and the minimal syllable consists only of a nucleus, as in the English words "eye" or "owe". The syllable nucleus is usually a vowel, in the form of a monophthong, diphthong, or triphthong, but sometimes is a syllabic consonant.

In most Germanic languages, lax vowels can occur only in closed syllables. Therefore, these vowels are also called checked vowels, as opposed to the tense vowels that are called free vowels because they can occur even in open syllables.