Inherent vowel
Writing systems with inherent vowels often use a special marking to silence the inherent vowel so that only a consonant is spoken, such as the virama found in many South Asian scripts. Other systems rely on the reader's knowledge of the language to know the difference between a consonant with the inherent vowel from a pure consonant (Hindi, Old Persian cuneiform) or to know a particular vowel-marked form from a pure consonant (Ge'ez and related scripts).