महाभारतः mahābhārataḥ - book-12, chapter-201, verse-31

आत्रेयश्च वसिष्ठश्च कश्यपश्च महानृषिः ।
गौतमः सभरद्वाजो विश्वामित्रोऽथ कौशिकः ॥३१॥

31. ātreyaśca vasiṣṭhaśca kaśyapaśca mahānṛṣiḥ ,
gautamaḥ sabharadvājo viśvāmitro'tha kauśikaḥ.

31. ātreyaḥ ca vasiṣṭhaḥ ca kaśyapaḥ ca mahānṛṣiḥ
gautamaḥ sabharadvājaḥ viśvāmitraḥ atha kauśikaḥ

31. mahānṛṣiḥ ātreyaḥ ca vasiṣṭhaḥ ca kaśyapaḥ ca
gautamaḥ sabharadvājaḥ atha viśvāmitraḥ kauśikaḥ

31. And Ātreya, Vasiṣṭha, and Kaśyapa, the great sage; Gautama along with Bharadvāja; and Viśvāmitra, and Kauśika.

Words meanings summery:

• आत्रेयः (ātreyaḥ) - Ātreya (descendant of Atri)

• च (ca) - and

• वसिष्ठः (vasiṣṭhaḥ) - Vasiṣṭha (name of a sage)

• च (ca) - and

• कश्यपः (kaśyapaḥ) - Kaśyapa (name of a sage)

• च (ca) - and

• महानृषिः (mahānṛṣiḥ) - great sage

• गौतमः (gautamaḥ) - Gautama (name of a sage)

• सभरद्वाजः (sabharadvājaḥ) - along with Bharadvāja (along with Bharadvāja; Bharadvāja (and associated))

• विश्वामित्रः (viśvāmitraḥ) - Viśvāmitra (name of a sage)

• अथ (atha) - and (then, now, moreover, and)

• कौशिकः (kauśikaḥ) - Kauśika (name of a sage/clan)

Words meanings and morphology

आत्रेयः (ātreyaḥ) - Ātreya (descendant of Atri)

(proper noun)

Nominative, masculine, singular of ātreya

ātreya - descendant of Atri; Name of a sage.

Patronymic from 'Atri'.

च (ca) - and

(indeclinable)

Conjunction.

वसिष्ठः (vasiṣṭhaḥ) - Vasiṣṭha (name of a sage)

(proper noun)

Nominative, masculine, singular of vasiṣṭha

vasiṣṭha - Name of a revered Vedic sage, one of the Saptarishis.

च (ca) - and

(indeclinable)

Conjunction.

कश्यपः (kaśyapaḥ) - Kaśyapa (name of a sage)

(proper noun)

Nominative, masculine, singular of kaśyapa

kaśyapa - Name of a revered Vedic sage, one of the Saptarishis, progenitor of various beings.

च (ca) - and

(indeclinable)

Conjunction.

महानृषिः (mahānṛṣiḥ) - great sage

(noun)

Nominative, masculine, singular of mahānṛṣi

mahānṛṣi - great sage, a seer of profound wisdom

Compound of 'mahā' (great) and 'ṛṣi' (sage), but with 'an' ending in 'mahān'.

Compound type : karmadhāraya (mahā+ṛṣi)

• mahā – great, mighty, large
  adjective
• ṛṣi – sage, seer, inspired poet
  noun (masculine)

Note: Refers to Kaśyapa in this context.

गौतमः (gautamaḥ) - Gautama (name of a sage)

(proper noun)

Nominative, masculine, singular of gautama

gautama - Name of a revered Vedic sage, one of the Saptarishis, founder of the Nyaya school of philosophy.

Patronymic from 'Gotama'.

सभरद्वाजः (sabharadvājaḥ) - along with Bharadvāja (along with Bharadvāja; Bharadvāja (and associated))

(adjective)

Nominative, masculine, singular of sabharadvāja

sabharadvāja - accompanied by Bharadvāja, having Bharadvāja

Bahuvrīhi compound: 'sa' (with) + 'bharadvāja' (name of sage).

Compound type : bahuvrīhi (sa+bharadvāja)

• sa – with, together with
  indeclinable
• bharadvāja – Name of a revered Vedic sage, one of the Saptarishis.
  proper noun (masculine)

Note: Implies Gautama is meant to be grouped with Bharadvāja.

विश्वामित्रः (viśvāmitraḥ) - Viśvāmitra (name of a sage)

(proper noun)

Nominative, masculine, singular of viśvāmitra

viśvāmitra - Name of a revered Vedic sage, one of the Saptarishis, originally a kṣatriya who attained brahminhood.

अथ (atha) - and (then, now, moreover, and)

(indeclinable)

Particle indicating sequence, beginning, or additional information.

कौशिकः (kauśikaḥ) - Kauśika (name of a sage/clan)

(proper noun)

Nominative, masculine, singular of kauśika

kauśika - descendant of Kuśika; name of a sage (often identified with Viśvāmitra, or a separate sage of the lineage)

Patronymic from 'Kuśika'.