योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-41, verse-17

गुरुशास्त्रार्थशिष्याणां चिरसंयोगसत्तया ।
अहनीव जनाचार आत्मज्ञानं प्रवर्तते ॥ १७ ॥

guruśāstrārthaśiṣyāṇāṃ cirasaṃyogasattayā ,
ahanīva janācāra ātmajñānaṃ pravartate 17

17. guruśāstrārthaśiṣyāṇām cirasaṃyogasattayā
ahanī iva janācāraḥ ātmajñānam pravartate

17. janācāraḥ ahanī iva,
guruśāstrārthaśiṣyāṇām cirasaṃyogasattayā ātmajñānam pravartate

17. Just as human customs (janācāra) gradually unfold day by day, so too does knowledge of the self (ātman) manifest through the enduring and substantial connection among a guru, the meaning of the scriptures, and disciples.

Words meanings summery:

• गुरुशास्त्रार्थशिष्याणाम् (guruśāstrārthaśiṣyāṇām) - of teachers, scriptural meanings, and disciples

• चिरसंयोगसत्तया (cirasaṁyogasattayā) - by the existence of a long-lasting conjunction/connection

• अहनी (ahanī) - in the days, day by day

• इव (iva) - like, as

• जनाचारः (janācāraḥ) - human custom, common practice of people

• आत्मज्ञानम् (ātmajñānam) - knowledge of the self (ātman)

• प्रवर्तते (pravartate) - proceeds, manifests, takes place

Words meanings and morphology

गुरुशास्त्रार्थशिष्याणाम् (guruśāstrārthaśiṣyāṇām) - of teachers, scriptural meanings, and disciples

(noun)

Genitive, masculine, plural of guruśāstrārthaśiṣya

guruśāstrārthaśiṣya - combination of guru, scriptural meaning, and disciple

Compound type : dvandva (guru+śāstrārtha+śiṣya)

• guru – spiritual teacher, preceptor, mentor, guru
  noun (masculine)
• śāstrārtha – meaning of the scriptures, purport of a doctrine
  noun (masculine)
• śiṣya – disciple, student
  noun (masculine)
  Root: śās (class 2)

चिरसंयोगसत्तया (cirasaṁyogasattayā) - by the existence of a long-lasting conjunction/connection

(noun)

Instrumental, feminine, singular of cirasaṃyogasattā

cirasaṁyogasattā - the state of long-lasting connection

Compound type : ṣaṣṭhī-tatpuruṣa (cira+saṃyoga+sattā)

• cira – long, lasting
  adjective
• saṃyoga – conjunction, union, connection
  noun (masculine)
  Prefix: sam
  Root: yuj (class 7)
• sattā – existence, being, reality, essence
  noun (feminine)
  Root: as (class 2)

अहनी (ahanī) - in the days, day by day

(noun)

Locative, neuter, dual of ahan

ahan - day

इव (iva) - like, as

(indeclinable)

जनाचारः (janācāraḥ) - human custom, common practice of people

(noun)

Nominative, masculine, singular of janācāra

janācāra - custom of people, common practice, janācāra

Compound type : ṣaṣṭhī-tatpuruṣa (jana+ācāra)

• jana – person, people
  noun (masculine)
  Root: jan (class 4)
• ācāra – custom, practice, conduct
  noun (masculine)
  Prefix: ā
  Root: car (class 1)

आत्मज्ञानम् (ātmajñānam) - knowledge of the self (ātman)

(noun)

Nominative, neuter, singular of ātmajñāna

ātmajñāna - knowledge of the self, self-knowledge

Compound type : ṣaṣṭhī-tatpuruṣa (ātman+jñāna)

• ātman – self, soul, spirit, ātman
  noun (masculine)
• jñāna – knowledge, wisdom
  noun (neuter)
  Root: jñā (class 9)

प्रवर्तते (pravartate) - proceeds, manifests, takes place

(verb)

3rd person , singular, middle, present indicative (laṭ) of pravart

Prefix: pra

Root: vṛt (class 1)