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40 SOUND SYNTHESIS IN IE, IIR & SANSKRIT
It is probable that m>n before v in external sandhi in IIr stage, but no sure evidence is citable outside OIA, 63. IIr Final s, š, r > ḥ in Skt; e.g.
avih < 1Ir aviš < IE owis cp Gk óis, kaḥ < IIr kas < IE quos cp Lat quus, antah < IIr antar < IE enter, cp J..at inter, Av antarə,
64, Fecause final r has become ḥ in Skt, in several forms it shows a sandhi treatment common with s/s, which also have become h finally. This is due to confusion of the origin of ḥ<r & ì<s's. But in several forms the ḥ<r, shows a different treatment independent from the treat. ment of ḥ <'s, where in fact the historical sandhi treatment of h < r has been preseved.
The following sections (642-68) present a complete picture of the various sandhi treatments of h<r'sis and their historical background, 64a. ḥ<s is lost before voiced sounds. In fact s>z, before voiced sounds in 18 & IIr. This is lost in Skt. IE z remained z in IIr only after ă (aftet ilălf, IE =>} in IIr; see 64b). This z was lost in Skt. IIr āz<Skt ā, Ilr a >Skt a before vowels except a; IIr az>Skto in external sandhi and Skt e in internal sandhi before the vowel a and before the voiced consonants; e.g. tah gacchanti > tā gacchanti (=1 Ir tāz gaššanti < IE tāz
gumskonti). devaḥ avadat> devo avadat > devo' vadat (= IIr daivaz
avadat). devaḥ āyāti > deva āyāti (=IIr daivaz āyāti). devaḥ gacchati > devo gacchati (=IIr daivaz gaššati). as +dhi > *azt-dhi>edhi (=IIr azdhi). Śās +dhi>*śāz-t-dhi > śādhi ( = IIr šāzdhi).
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