deriv SD cv (325) ashtadhyayi.com hei.de L 325 ETT STT a 6.4.7 ALPH OLDHOMEPAGE NEWHOMEPAGE

nopadhAyAH नोपधायाः ONPANINI 64007

The vowel before the final n न् of a base lengthens before /nAm.

Most nbases न्बसेस् (yogin- योगिन् nAman- नामन् rAjan- राजन्...) get no /nAm, because usually /nAm appears only after some vowel bases by hrasvanadyAp.... So this rule applies only to the /SaT that end in n न्, which get /nAm by SaTcaturbhyazca.

paJcan- पञ्चन् + /Am
→ paJcan- पञ्चन् + /nAm by SaTcaturbhyazca
→ paJcAn- पञ्चान् + /nAm by this rule
→ paJcA- पञ्चाॱ + /nAm by nalopaHprAt... by nalopaHprAt....