Pāṇini sūtras

A Tat-purusha compound ending with the words ‘upajñâ’ (invention) and ‘upakrama’ (commencement) is neuter in gender, when it is intended to express the starting point of a work which is first invented or commenced.

1. upajñā+upakramamउपज्ञा+उपक्रमम्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	upajñāउपज्ञा	upajñāउपज्ञा	upajñā [word]उपज्ञा [wओर्द्]	upajñउपज्ञ् + plus āआ
   uउ	upakramaउपक्रम	upakramamउपक्रमम्	upakrama [word]	upakramउपक्रम् + plus amअम्

2. tad+ādi+ācikhyāsāyāmतद्+आदि+आचिख्यासायाम्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   tत्	tadतद्	tadतद्	this	tadतद्
   āआ	ādiआदि	ādiआदि	beginning	ādआद् + plus iइ
   āआ	ācikhyās&#आचिख्यास्&#	ācikhyāsāyāmआचिख्यासायाम्	purpose	ācikhyāsआचिख्यास् + plus āyआय्

Anuvṛtti

1. napuṃsakamनपुंसकम् 2·4·17

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   nन्	napuṃsakaनपुंसक	napuṃsakamनपुंसकम्	neuter	napuṃsakनपुंसक् + plus amअम्

2. a+nañ+karmadhārayaḥअ+नञ्+कर्मधारयः 2·4·19

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	not	aअ
   nन्	nañनञ्	nañनञ्	nañनञ्	nañनञ्
   kक्	karmadhārayaकर्मधारय	karmadhārayaḥकर्मधारयः	karmadhārayaकर्मधारय	karmadhārayकर्मधारय् + plus aḥअः