deriv SD cv (391) ashtadhyayi.com hei.de L 391 ETT STT a 7.2.110 ALPH OLDHOMEPAGE NEWHOMEPAGE

yas sau यः सौ ONPANINI 72110

(Replace id इद् of /idam-) with y य् before /su.

This only applies to the f because, in the m , idoypuMsi > makes **ayam अयम्, and in the neuter there is no /su and we get **idam इदम्.

/idam- f + /su
→ idam- इदम् + /su (because << idamomaH overrides <8 tyadAdInAmaH)
→ iyam- इयम् + /su by this rule
→ !**iyam इयम् f "this" by halGyAbbhyodIrgh...