Pāṇini sūtras

The indeclinable word yathâ when it does not signify ‘likeness’ is invariably compounded, with a word ending in a case-affix which is in construction with it and the compound is called an Avyayûbhâva Samâsa.

1. yathā+a+sādṛśyeयथा+अ+सादृश्ये

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   yय्	yathāयथा	yathāयथा	yathā [word]यथा [wओर्द्]	yathāयथा
   aअ	aअ	aअ	not	aअ
   sस्	sādṛśसादृश्	sādṛśyeसादृश्ये	resemblance	sādṛśyसादृश्य् + plus eए

Anuvṛtti

1. avyayībhāvaḥअव्ययीभावः 2·1·5

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	avyayībhāvअव्ययीभाव्	avyayībhāvaḥअव्ययीभावः	avyayībhāvaअव्ययीभाव	avyayībhāvअव्ययीभाव् + plus aḥअः

2. vibhakti+samīpa+samṛddhi+vyṛddhi+artha+abhāva+atyaya+a+samprati+śabda+prādurbhāva+paścāt+yathā+ānupūrvya+yaugapadya+sādṛśya+sampatti+sākalya+anta+vacaneṣuविभक्ति+समीप+समृद्धि+व्यृद्धि+अर्थ+अभाव+अत्यय+अ+सम्प्रति+शब्द+प्रादुर्भाव+पश्चात्+यथा+आनुपूर्व्य+यौगपद्य+सादृश्य+सम्पत्ति+साकल्य+अन्त+वचनेषु 2·1·6

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	atyayaअत्यय	atyayaअत्यय	death	atyayअत्यय् + plus aअ