योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-8, verse-21

ततो मुनीनां संसर्गात्तपस्युग्रे व्यवस्थितः ।
अवसन्मेरुगहने मन्वन्तरमनिन्दितः ॥ २१ ॥

tato munīnāṃ saṃsargāttapasyugre vyavasthitaḥ ,
avasanmerugahane manvantaramaninditaḥ 21

21. tataḥ munīnām saṃsargāt tapasi ugre vyavasthitaḥ
avasan meru-gahane manvantaram aninditaḥ

21. tataḥ munīnām saṃsargāt,
ugre tapasi vyavasthitaḥ,
aninditaḥ,
meru-gahane manvantaram avasan.

21. Then, through association with sages, he became steadfast in severe asceticism (tapas). Blameless, he resided in the deep forest of Mount Meru for a full manvantara.

Words meanings summery:

• ततः (tataḥ) - then, thence, afterwards

• मुनीनाम् (munīnām) - of the sages, of the ascetics

• संसर्गात् (saṁsargāt) - due to association (from contact, by association)

• तपसि (tapasi) - in asceticism (tapas) (in austerity, in asceticism)

• उग्रे (ugre) - in severe (austerity) (in fierce, in severe)

• व्यवस्थितः (vyavasthitaḥ) - became steadfast/established (established, fixed, steadfast, settled)

• अवसन् (avasan) - he lived (referring to Śukra); grammatically, this is 3rd plural imperfect. It does not match the singular subject implied by vyavasthitaḥ and aninditaḥ. This might be a textual anomaly, a rare honorific plural, or implies a broader collective subject (e.g., Śukra and the sages with whom he associated). For parsing, it is identified as plural. (they lived, they resided)

• मेरु-गहने (meru-gahane) - in the deep forest of Meru

• मन्वन्तरम् (manvantaram) - for a manvantara (epoch), an age of Manu

• अनिन्दितः (aninditaḥ) - blameless, irreproachable, faultless

Words meanings and morphology

ततः (tataḥ) - then, thence, afterwards

(indeclinable)

Adverbial form.

मुनीनाम् (munīnām) - of the sages, of the ascetics

(noun)

Genitive, masculine, plural of muni

muni - sage, ascetic, recluse

Root: man (class 4)

संसर्गात् (saṁsargāt) - due to association (from contact, by association)

(noun)

Ablative, masculine, singular of saṃsarga

saṁsarga - contact, union, association, intercourse

From sam + sṛj (to let go, create, come together).

Prefix: sam

Root: sṛj (class 6)

तपसि (tapasi) - in asceticism (tapas) (in austerity, in asceticism)

(noun)

Locative, neuter, singular of tapas

tapas - heat, asceticism, penance, austerity (tapas)

From root tap (to heat, to perform penance).

Root: tap (class 1)

उग्रे (ugre) - in severe (austerity) (in fierce, in severe)

(adjective)

Locative, neuter, singular of ugra

ugra - fierce, terrible, severe, mighty

Note: Agrees with tapasi.

व्यवस्थितः (vyavasthitaḥ) - became steadfast/established (established, fixed, steadfast, settled)

(adjective)

Nominative, masculine, singular of vyavasthita

vyavasthita - established, fixed, settled, situated, arranged

Past Passive Participle

From root sthā (to stand) with prefixes vi and ava.

Prefixes: vi+ava

Root: sthā (class 1)

Note: Modifies the implicit subject (Śukra).

अवसन् (avasan) - he lived (referring to Śukra); grammatically, this is 3rd plural imperfect. It does not match the singular subject implied by vyavasthitaḥ and aninditaḥ. This might be a textual anomaly, a rare honorific plural, or implies a broader collective subject (e.g., Śukra and the sages with whom he associated). For parsing, it is identified as plural. (they lived, they resided)

(verb)

3rd person , plural, active, past imperfect (laṅ) of vas

Root: vas (class 1)

Note: See contextual_meaning and word_base_data_json notes for discussion on number.

मेरु-गहने (meru-gahane) - in the deep forest of Meru

(noun)

Locative, neuter, singular of meru-gahana

meru-gahana - deep forest of Meru; a dense Meru-like place

Compound meru (Mount Meru, a mythical mountain) + gahana (deep, dense forest).

Compound type : tatpuruṣa (meru+gahana)

• meru – Mount Meru (mythical golden mountain, center of the universe); a mountain
  proper noun (masculine)
• gahana – deep, dense, impenetrable; a deep forest
  adjective/noun (neuter)

मन्वन्तरम् (manvantaram) - for a manvantara (epoch), an age of Manu

(noun)

Accusative, neuter, singular of manvantara

manvantara - a period of time, an age (specifically, the reign of a Manu, equal to 71 yugas or 306,720,000 human years)

Compound manu (Manu) + antara (interval, period).

Note: Accusative of duration of time.

अनिन्दितः (aninditaḥ) - blameless, irreproachable, faultless

(adjective)

Nominative, masculine, singular of anindita

anindita - unblamed, faultless, irreproachable

Past Passive Participle (negated)

Negative prefix a + nindita (blamed, from root nid to blame).

Prefix: a

Root: nid (class 1)