In addition, as in other Ethio-Semitic languages, certain roots include inherent vowels and/or gemination (lengthening) of particular consonants.
among the three-consonant roots, there are three subclasses: CCC, CaCC, CC C. As we have seen, the stem of a Semitic verb can be viewed as the result of the insertion of pattern vowels between root consonants and the copying of root consonants in particular positions.