योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-87, verse-4

अथ ते शान्तबाह्यार्था ब्रह्मत्वे कृतभावनाः ।
तस्थुश्चतुर्युगस्यान्ते यावत्कल्पः क्षयं गतः ॥ ४ ॥

atha te śāntabāhyārthā brahmatve kṛtabhāvanāḥ ,
tasthuścaturyugasyānte yāvatkalpaḥ kṣayaṃ gataḥ 4

4. atha te śāntabāhyārthāḥ brahmatve kṛtabhāvanāḥ
tasthuḥ caturyugasya ante yāvat kalpaḥ kṣayam gataḥ

4. atha śāntabāhyārthāḥ brahmatve kṛtabhāvanāḥ te
caturyugasya ante yāvat kalpaḥ kṣayam gataḥ tasthuḥ

4. Then, with their external concerns pacified and their thoughts fixed on the nature of Brahman (brahman), they remained until the end of the four-age cycle (catur-yuga), at which time the cosmic day (kalpa) itself reached its dissolution.

Words meanings summery:

• अथ (atha) - then, thereafter (now, then, thereafter, thus)

• ते (te) - they (the beings from previous verses, now with higher aspirations) (they)

• शान्तबाह्यार्थाः (śāntabāhyārthāḥ) - those whose external concerns were pacified (those for whom external objects are pacified)

• ब्रह्मत्वे (brahmatve) - on the nature of Brahman (in the state/nature of Brahman)

• कृतभावनाः (kṛtabhāvanāḥ) - whose thoughts were fixed (on Brahman) (those who have made/fixed their contemplation/thought)

• तस्थुः (tasthuḥ) - they remained (they stood, they remained)

• चतुर्युगस्य (caturyugasya) - of the four-age cycle (of a four-age cycle (catur-yuga))

• अन्ते (ante) - at the end (at the end, in the end, finally)

• यावत् (yāvat) - until (until, as long as)

• कल्पः (kalpaḥ) - the cosmic day (kalpa) (a cosmic day of Brahmā, a long period of time, creation cycle)

• क्षयम् (kṣayam) - dissolution, end (destruction, end, loss, decay)

• गतः (gataḥ) - reached (dissolution) (gone, reached, attained)

Words meanings and morphology

अथ (atha) - then, thereafter (now, then, thereafter, thus)

(indeclinable)

ते (te) - they (the beings from previous verses, now with higher aspirations) (they)

(pronoun)

Nominative, masculine, plural of tad

tad - that, he, she, it

शान्तबाह्यार्थाः (śāntabāhyārthāḥ) - those whose external concerns were pacified (those for whom external objects are pacified)

(adjective)

Nominative, masculine, plural of śāntabāhyārtha

śāntabāhyārtha - having external objects/concerns pacified

Compound type : bahuvrīhi (śānta+bāhya+artha)

• śānta – calm, peaceful, pacified, ceased
  adjective
  Past Passive Participle
  Past Passive Participle of √śam
  Root: śam (class 4)
• bāhya – external, outer, outward
  adjective
  Derived from bahis (outside)
• artha – object, purpose, meaning, wealth, concern
  noun (masculine)

Note: Agrees with te.

ब्रह्मत्वे (brahmatve) - on the nature of Brahman (in the state/nature of Brahman)

(noun)

Locative, neuter, singular of brahmatva

brahmatva - the state of Brahman, Brahman-ness, divinity

From brahman with -tva suffix

Note: Specifies the object of their contemplation.

कृतभावनाः (kṛtabhāvanāḥ) - whose thoughts were fixed (on Brahman) (those who have made/fixed their contemplation/thought)

(adjective)

Nominative, masculine, plural of kṛtabhāvanā

kṛtabhāvanā - having made/fixed one's thought/contemplation

Compound type : bahuvrīhi (kṛta+bhāvanā)

• kṛta – done, made, performed
  adjective
  Past Passive Participle
  Past Passive Participle of √kṛ
  Root: kṛ (class 8)
• bhāvanā – contemplation, meditation, thought, imagination
  noun (feminine)
  From causative of √bhū
  Root: bhū (class 1)

Note: Agrees with te.

तस्थुः (tasthuḥ) - they remained (they stood, they remained)

(verb)

3rd person , plural, active, past perfect (liṭ) of sthā

Perfect Active

3rd person plural Perfect active of √sthā

Root: sthā (class 1)

चतुर्युगस्य (caturyugasya) - of the four-age cycle (of a four-age cycle (catur-yuga))

(noun)

Genitive, neuter, singular of caturyuga

caturyuga - a cycle of four ages (yugas), a Mahāyuga

Compound of catur (four) and yuga (age)

Compound type : tatpuruṣa or dvigu (catur+yuga)

• catur – four
  numeral
• yuga – age, epoch, yoke, pair
  noun (neuter)

Note: Possessive relationship with ante.

अन्ते (ante) - at the end (at the end, in the end, finally)

(noun)

Locative, masculine, singular of anta

anta - end, limit, boundary, conclusion

Root: ant (class 1)

Note: Temporal adverbial.

यावत् (yāvat) - until (until, as long as)

(indeclinable)

कल्पः (kalpaḥ) - the cosmic day (kalpa) (a cosmic day of Brahmā, a long period of time, creation cycle)

(noun)

Nominative, masculine, singular of kalpa

kalpa - a day of Brahmā, a cosmic cycle, an aeon, creation, possibility

From √kḷp

Root: kḷp (class 1)

Note: Subject of kṣayam gataḥ.

क्षयम् (kṣayam) - dissolution, end (destruction, end, loss, decay)

(noun)

Accusative, masculine, singular of kṣaya

kṣaya - destruction, loss, decay, end, dwelling

From √kṣi

Root: kṣi (class 5)

Note: Object of gataḥ, often used in phrases like kṣayam gam (to go to destruction).

गतः (gataḥ) - reached (dissolution) (gone, reached, attained)

(adjective)

Nominative, masculine, singular of gata

gata - gone, moved, reached, attained, passed

Past Passive Participle

Past Passive Participle of √gam

Root: gam (class 1)

Note: Agrees with kalpaḥ.