Amonophthong (pronounced "Mono-F-thong") is simply avowel. The word monophthong comes from the old Greek language.Mono meansone orsingle, and the-phthong meanssound ortone, from the basic wordphthalein, which meansto speak,create sound with the voice. The wordmonophthong shows that a vowel is spoken with exactly one tone and one mouth position. For example, when you say "teeth", then while you are creating the sound of the "ee", nothing changes for that sound.
Amonophthong can be alexeme of alanguage and as such it can as well be asyllable. There is no shorter syllable than a singlemonophthong.