The article deals with the problem of open roots, which formally end with vowels. Such roots can only be found in the stem of the infinitive, but the consonants [j] and [v] can be found in other forms of the verb, e.g. lóti -lója, lójo “to bark”; sė́ti - sė́ja, sė́jo “to sow”; žū́ti - žū̃va, žùvo “to die”; kliáuti - kliáuja, klióvė “to trust”. Considering the phonological structure of the root, the sounds [j] and [v] should be interpreted not as interfixes (connectors), but as parts of the root, which may be the way to solve the problem of unusual open roots of verbs in Lithuanian.