In his study of Arabic phonetics, Asbāb ḥudūṯ al-ḥurūf (The Causes of the Genesis of the 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 in glosses to Arabic manuscripts of the 13th century. This study attempts to elucidate the sound Ibn Sīnā describes both through reference to his own system of phonetic terminology and through comparison with extant material in the Khwarizmian language.
