Vedic differs from Classical Sanskrit to an extent comparable to the difference between
Homeric Greek and
Classical Greek. The following differences between Vedic and Classical Sanskrit may be observed in the phonology: • Vedic had a
voiced retroflex lateral approximant as well as its breathy-voiced counterpart , which are not found in classical Sanskrit; these were allophones of the corresponding plosives
ḍ () and
ḍh (). • The vowels
e and
o were realized in Vedic as
diphthongs
ai and
au, but they became
monophthongs in later Sanskrit, such as '
> 'and '
>'. However, the diphthongal quality still resurfaces in sandhi. • The vowels
ai and
au were realized in Vedic as long
diphthongs
āi and
āu, respectively, but they became correspondingly short in Classical Sanskrit: '
> '. • The Prātiśākhyas claim that the "dental" consonants were articulated from the teeth ridge (
dantamūlīya,
alveolar), but they became
dentals later, whereas most other authorities including Pāṇini designate them as dentals. • The Prātiśākhyas are inconsistent about but generally claim that it was also a
dantamūlīya. According to Pāṇini it is a
retroflex consonant. which only distinguishes tone height. However, the contraction of two syllables, the first of which carries an
udātta (high pitch) and the second a so-called "dependent
svarita" (high falling pitch), gave rise to a small number of words with the "independent
svarita" on a short vowel in a late pronunciation of Vedic. The origin of the independent
svarita can be inferred from metrically restored versions of the
Rig Veda. This tonal system persisted for some time after the Vedic period. Early Sanskrit grammarian
Pāṇini marked the position of the accent, giving accent rules for both the spoken language of his time as well as the differences of Vedic accent. However, no extant post-Vedic text with accents are found.
Pluti Pluti, or
prolation, is the term for the phenomenon of protracted or
overlong vowels in
Sanskrit; the overlong or
prolated vowels are themselves called
pluta. Pluta vowels are usually noted with a numeral "3" () indicating a length of three
morae (). A diphthong is prolated by prolongation of its first vowel.
Pāṇinian grammarians recognise the phonetic occurrence of diphthongs measuring more than three morae in duration, but classify them all as prolated (i.e. trimoraic) to preserve a strict tripartite division of vocalic length between (short, 1 mora), (long, 2 morae) and (prolated, 3+ morae).
() rendered with pluta'' Pluta vowels are recorded a total of 3 times in the
Rigveda and 15 times in the
Atharvaveda, typically in cases of questioning and particularly where two options are being compared. For example: • : "Was it above? Was it below?" : Rigveda 10.129.5d • : "Is this larger? Or this?" : Atharvaveda 9.6.18 The attained the peak of their popularity in the
Brahmana period of late Vedic Sanskrit (roughly 8th century BC), with some 40 instances in the
Shatapatha Brahmana alone. ==Grammar==