It thus becomes possible to establish that in certain languages, such as the Semitic ones, the roots are bisyllabic (and generally of three letters); that in others (the Indo Germanic ones) they are regularly monosyllabic; some are constituted by a single vowel (i is the root of verbs meaning 'to go', of those meaning 'to reverberate'); but in general, in these languages, the root comprises at least one consonant and one vowel