The paper deals with the use of consonantal cluster conjuncts in the Turkic runiform script system optimally adapted to the East Old Turkic sound structure. The author argues that this system follows essentially syllabic principles distinguishing between front and back syllables. When two consonants meet, conjunct letters may be used, indicating that no inherent vowel is to be pronounced before the second consonant. Special signs were added for combinations such as ld and nd. These have developed into characters in their own right.

Keywords: East Old Turkic script system; syllabic principle; consonantal cluster conjuncts