Abstract:

The Arabic alphabet is divided into consonants and vowels, some add semi vowels. There are three short vowels (motion) which are respectively the sounds /a/, / i/ , and /u/, not considered to be part of the Arabic alphabet and are written as diacritics. There are three long vowels /a:/, / i:/ , and /u:/ . There exist a special diacritic sign named no vowel (sukuun /°/ or stillnes). Sukun /°/ is the absence of the vowels /a/,/ i/, and /u/, but it is also a vocalic sign and signify quiescence (pause). In this research, we attempt to use some features of the Arabic language as motion (Harakaat) and stillness (sukuun /°/) and consonants. We propose to use the conception of (sukuun /°/) and a mathematical order relationship of the consonants based on their articulation of sound, to classify trilateral roots of Arabic verbs, for the purpose of using them in diacritization of Arabic words.