A syllable is a unit of organization for a sequence of speech. It is typically made up of a syllable nucleus (most often a vowel) with optional initial and final margins (typically, consonants). Syllables are often considered the phonological "building blocks" of words. They can influence the rhythm of a language, its prosody, its poetic meter and its stress patterns. Speech can usually be divided up into a whole number of syllables: for example, the word water is composed of two syllables: wa and ter.