A syllabic consonant or vocalic consonant is a consonant which either forms a syllable on its own, like the m, n and l in the English words rhythm, button and bottle, or is the nucleus of a syllable, such as the r sound in the American pronunciation of work. The diacritic for this in the International Phonetic Alphabet (IPA) is the under-stroke, ⟨U+0329  ̩ COMBINING VERTICAL LINE BELOW⟩. It may be represented by an over-stroke, ⟨U+030D  ̍ COMBINING VERTICAL LINE ABOVE⟩, if the symbol that it modifies has a descender, such as in [ŋ̍].