In "Angerthas Moria" the cirth and were dropped. Thus and were adopted for and , although they were used for and in Elvish languages. Subsequently, this script used the certh for , which had the sound in the Elvish systems. Therefore, the certh (which was previously used for the sound , useless in Khuzdul) was adopted for the sound . A totally new introduction was the certh , used as an alternative, simplified and, maybe, weaker form of . Because of the visual relation of these two cirth, the certh was given the sound to relate better with that, in this script, had the sound .