Inlinguistics, a monosyllable is a wordorutterance of only one syllable.[1] It is most commonly studied in the fields of phonology and morphology and it has no semantic content.[2] The word has originated from the Greek language.[3]
"Yes", "no", "jump", "buy", "heat", "sure", "cough", and "and" are examples of monosyllables.[4][5] Some of the longest monosyllabic words in the English language, all containing nine letters each, are "screeched," "schlepped," "scratched," "scrounged," "scrunched," "stretched," "straights," and "strengths."[6]
The dictionary definition of monosyllable at Wiktionary