non-syllabic
/ˌnɒnsɪˈlabɪk/adjective
1= asyllabic; ( Linguistics, of a speech sound) that does not constitute the peak sonority of a syllable.
2Not syllable-timed.
noun
Linguistics. A non-syllabic speech sound.
Origin
Mid 19th century. From non- + syllabic. Compare earlier asyllabic.