Abstract In his study of Arabic phonetics, Asbāb ḥudūṯ al-ḥurūf (The Causes the Genesis Consonants), Ibn Sīnā briefly surveys some speech sounds found in languages other than Arabic, among them one particular to Khwarizmian, an Iranian language attested primarily glosses manuscripts 13th century. This attempts elucidate sound describes both through reference own system phonetic terminology and ...