महाभारतः mahābhārataḥ - book-6, chapter-62, verse-39

द्वापरस्य युगस्यान्ते आदौ कलियुगस्य च ।
सात्वतं विधिमास्थाय गीतः संकर्षणेन यः ॥३९॥

39. dvāparasya yugasyānte ādau kaliyugasya ca ,
sātvataṁ vidhimāsthāya gītaḥ saṁkarṣaṇena yaḥ.

39. dvāparasya yugasya ante ādau kaliyugasya ca
sātvatam vidhim āsthāya gītaḥ saṃkarṣaṇena yaḥ

39. yaḥ dvāparasya yugasya ante ca kaliyugasya ādau
sātvatam vidhim āsthāya saṃkarṣaṇena gītaḥ

39. This (method or teaching), which was proclaimed by Saṃkarṣaṇa, adopting the Sattvata tradition, at the end of the Dvapara age (yuga) and the beginning of the Kali age (yuga).

Words meanings summery:

• द्वापरस्य (dvāparasya) - of the Dvapara

• युगस्य (yugasya) - of the age

• अन्ते (ante) - at the end

• आदौ (ādau) - at the beginning

• कलियुगस्य (kaliyugasya) - of the Kali Yuga

• च (ca) - and

• सात्वतम् (sātvatam) - the Sattvata (method/tradition)

• विधिम् (vidhim) - method, rule

• आस्थाय (āsthāya) - having resorted to, having adopted

• गीतः (gītaḥ) - sung, proclaimed

• संकर्षणेन (saṁkarṣaṇena) - by Saṃkarṣaṇa

• यः (yaḥ) - which, who

Words meanings and morphology

द्वापरस्य (dvāparasya) - of the Dvapara

(proper noun)

Genitive, masculine, singular of dvāpara

dvāpara - Dvapara (the third age or yuga in Hindu cosmology)

युगस्य (yugasya) - of the age

(noun)

Genitive, neuter, singular of yuga

yuga - an age, an era, a world age (yuga)

अन्ते (ante) - at the end

(noun)

Locative, masculine, singular of anta

anta - end, limit, boundary

आदौ (ādau) - at the beginning

(noun)

Locative, masculine, singular of ādi

ādi - beginning, first, primary

कलियुगस्य (kaliyugasya) - of the Kali Yuga

(noun)

Genitive, masculine, singular of kaliyuga

kaliyuga - Kali Yuga (the current and last of the four yugas)

Compound type : Tatpurusha (kali+yuga)

• kali – Kali (the personification of the age of strife and vice), loss, defeat
  noun (masculine)
• yuga – an age, an era, a world age (yuga)
  noun (neuter)

च (ca) - and

(indeclinable)

सात्वतम् (sātvatam) - the Sattvata (method/tradition)

(adjective)

Accusative, masculine, singular of sātvata

sātvata - relating to the Satvatas (a Yadava clan, often associated with Vāsudeva worship), righteous, virtuous; the Sattvata system/tradition

विधिम् (vidhim) - method, rule

(noun)

Accusative, masculine, singular of vidhi

vidhi - rule, method, injunction, ordinance, destiny

आस्थाय (āsthāya) - having resorted to, having adopted

(indeclinable)

Absolutive (gerund)

formed from ā-√sthā + -ya

Prefix: ā

Root: sthā (class 1)

गीतः (gītaḥ) - sung, proclaimed

(adjective)

Nominative, masculine, singular of gīta

gīta - sung, chanted, proclaimed

Past Passive Participle

Root: gai (class 1)

संकर्षणेन (saṁkarṣaṇena) - by Saṃkarṣaṇa

(proper noun)

Instrumental, masculine, singular of saṃkarṣaṇa

saṁkarṣaṇa - Saṃkarṣaṇa (the elder brother of Krishna, an emanation of Viṣṇu)

यः (yaḥ) - which, who

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what (relative pronoun)