Pāṇini sūtras

bhuja ‘an arm’, and nyubja ‘a kind of bodily disease’, are irregularly formed, without any change of their ja before ghañ.

1. bhuja+nyubjauभुज+न्युब्जौ

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   bब्	bhujaभुज	bhujaभुज	bhuja [word]	bhujभुज् + plus aअ
   nन्	nyubjaन्युब्ज	nyubjauन्युब्जौ	nyubja [word]	nyubjन्युब्ज् + plus auऔ

2. pāṇi+upatāpayoḥपाणि+उपतापयोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pāṇiपाणि	pāṇiपाणि	hand	pāṇपाण् + plus iइ
   uउ	upatāpaउपताप	upatāpayoḥउपतापयोः	heat	upatāpउपताप् + plus ayoḥअयोः

Anuvṛtti

1. naन 7·3·59

   Part	Lexeme	Sandhi form	Meaning	Stem
   nन्	naन	naन	not	naन

2. kuकु 7·3·52

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   kक्	kuकु	kuकु	guttural	kक् + plus uउ