Page "Abjad" Paragraph 9

" Impure " abjads have characters for some vowels, optional vowel diacritics, or both.

The term " pure " abjad refers to scripts entirely lacking in vowel indicators.

However, most modern abjads, such as Arabic, Hebrew, Aramaic and Avestan, are " impure " abjads, that is, they also contain symbols for some of the vowel phonemes.

An example of a " pure " abjad is ancient Phoenician.