The paper discusses etymology of some stems, among them, kh-ev-a ‘to sound, to talk aloud, to recite’, m-kh-i-ar-ul-i ‘cheerful’, sa-kh-el-i ‘name’. In this paper, it is supposed that these stems are derived from the root -kh-. The same root occurs in verbs kh-ed-v-a ‘to see’, kh-eb-a ‘to touch’. The original meaning of the root -kh- must have been expression of physical contact. The similar shared etymology of different perception verbs is attested in wide range of languages and has been examined in lexical typology.