A syllable is a part of a word that contains a single vowel sound and that is pronounced as a unit. So, for example, "book" has one syllable, and "reading" has two syllables. 音节
noun [专属名词]音节;只言片语;表示音节的符号
We children called her Oma, accenting both syllables. 我们这些孩子叫她,两个音节都重读。