Vowels Proto-Dravidian contrasted between five short and long vowels:
*a,
*ā,
*i,
*ī,
*u,
*ū,
*e,
*ē,
*o,
*ō. The sequences
*ai and
*au are treated as
*ay and
*av (or *
aw).
Consonants Proto-Dravidian has been reconstructed as having the following consonant phonemes: The singular alveolar plosive
*ṯ developed into an alveolar trill in many of the South and South Central languages, it later merged with the tap in many of them; Tulu has /d͡ʒ, d̪, ɾ/ as reflexes, Manda-Kui made it /d͡ʒ/ and Hill-Maria Gondi made it /ʁ/.
*ṯṯ and
*nṯ became /r̥, nr/ in Konda and [tr, ndr] in many Tamil dialects. Apart from them, other languages did not rhotacize it, instead either preserving them or merging it with other sets of stops like dentals in Kannada, retroflexes in Telugu or palatals in Manda-Kui and some languages of Kerala. Central made all alveolars dental which is one of the features distinguishing it from South Central branch and North made it /r, s/. For example, Tamil
āṟu, Tulu
āji, Naiki
sādi, Kui
hāja; Tamil
puṟṟu, Tulu
puñca, Kannada
huttu, Naiki
puṭṭa, Konda
puRi, Malto
pute; Tamil
onṟu, Tulu
oñji, Pengo
ronje, Brahui
asi. Velar nasal
*ṅ occurred only before
*k in Proto-Dravidian (as in many of its daughter languages). Therefore, it is not considered a separate phoneme in Proto-Dravidian. However, it attained phonemic status in languages like Malayalam,
Gondi,
Konda and
Pengo because the original sequence
*ṅk was simplified to
*ṅ or
*ṅṅ. The glottal fricative
*H has been proposed by to account for the Old Tamil Aytam (
Āytam) and other Dravidian comparative phonological phenomena.
P. S. Subrahmanyam reconstructs 6 nasals for PD compared to 4 by Krishnamurti, who also does not reconstruct a laryngeal. The
Northern Dravidian languages Kurukh,
Malto and
Brahui cannot easily be derived from the traditional Proto-Dravidian phonological system. Bhadriraju and others traditionally proposes *c, *k retracting to *k, *q before vowels other than *i(:), and Brahui and Kurukh spirantized the *q, e.g. Tamil kaṇ, Malto qanu; Kananda kem-, Brahui xisun; but there are exceptions, Tamil cōr, Malto curg̣e; Koraga jōku, Brahui cōshing. proposes that they branched off from an earlier stage of Proto-Dravidian than the conventional reconstruction, which would apply only to the other languages. He suggests reconstructing a richer system of dorsal stop consonants: ==Numerals==