Sanskrit
Phonology

Sanskrit shares many Proto-Indo-European phonological features, although it features a larger inventory of distinct phonemes. The consonantal system is the same, though it systematically enlarged the inventory of distinct sounds. For example, Sanskrit added a voiceless aspirated "tʰ", to the voiceless "t", voiced "d" and voiced aspirated "dʰ" found in PIE languages.

The most significant and distinctive phonological development in Sanskrit is vowel merger. The short *e, *o and *a, all merge as a (अ) in Sanskrit, while long *ē, *ō and *ā, all merge as long ā (आ). Compare Sanskrit nāman to Latin nōmen. These mergers occurred very early and significantly affected Sanskrit's morphological system. Some phonological developments in it mirror those in other PIE languages. For example, the labiovelars merged with the plain velars as in other satem languages. The secondary palatalization of the resulting segments is more thorough and systematic within Sanskrit. For example, unlike the loss of the morphological clarity from vowel contraction that is found in early Greek and related southeast European languages, Sanskrit deployed *y, *w, and *s intervocalically to provide morphological clarity.
punctuation:no_comma