महाभारतः mahābhārataḥ - book-1, chapter-61, verse-51

षष्ठस्तु मतिमान्यो वै तेषामासीन्महासुरः ।
अभीरुरिति विख्यातः क्षितौ राजर्षिसत्तमः ॥५१॥

51. ṣaṣṭhastu matimānyo vai teṣāmāsīnmahāsuraḥ ,
abhīruriti vikhyātaḥ kṣitau rājarṣisattamaḥ.

51. ṣaṣṭhaḥ tu matimān yaḥ vai teṣām āsīt mahāsuraḥ
| abhīruḥ iti vikhyātaḥ kṣitau rājarṣisattamaḥ

51. Among them, the sixth, who was an intelligent great Asura, became renowned on earth as Abhiru, the foremost of royal sages.

Words meanings summery:

• षष्ठः (ṣaṣṭhaḥ) - the sixth one (sixth)

• तु (tu) - and (but, indeed, and)

• मतिमान् (matimān) - intelligent (intelligent, wise, thoughtful)

• यः (yaḥ) - who (who, which)

• वै (vai) - indeed (emphatic particle) (indeed, surely, verily)

• तेषाम् (teṣām) - among them (of them)

• आसीत् (āsīt) - was (was, existed)

• महासुरः (mahāsuraḥ) - a great Asura (great demon, great asura)

• अभीरुः (abhīruḥ) - Abhiru (as a proper name) (fearless, brave; Abhiru (a proper name))

• इति (iti) - named, as (thus, so, in this manner (marks direct speech or a name))

• विख्यातः (vikhyātaḥ) - renowned (famous, renowned, well-known)

• क्षितौ (kṣitau) - on earth (on the earth, in the land)

• राजर्षिसत्तमः (rājarṣisattamaḥ) - the foremost of royal sages (best among royal sages, excellent royal sage)

Words meanings and morphology

षष्ठः (ṣaṣṭhaḥ) - the sixth one (sixth)

(adjective)

Nominative, masculine, singular of ṣaṣṭha

ṣaṣṭha - sixth; a sixth part

ordinal numeral from ṣaṣ (six)

तु (tu) - and (but, indeed, and)

(indeclinable)

मतिमान् (matimān) - intelligent (intelligent, wise, thoughtful)

(adjective)

Nominative, masculine, singular of matimat

matimat - intelligent, wise, thoughtful, possessed of intellect

possessive adjective

suffix -mat (having) from mati (intellect)

यः (yaḥ) - who (who, which)

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what

वै (vai) - indeed (emphatic particle) (indeed, surely, verily)

(indeclinable)

तेषाम् (teṣām) - among them (of them)

(pronoun)

Genitive, plural of tad

tad - that, he, she, it, they, those

आसीत् (āsīt) - was (was, existed)

(verb)

3rd person , singular, active, imperfect (laṅ) of as

Root: as (class 2)

महासुरः (mahāsuraḥ) - a great Asura (great demon, great asura)

(noun)

Nominative, masculine, singular of mahāsura

mahāsura - a great demon or anti-god, a powerful asura

Compound type : karmadhāraya (mahat+asura)

• mahat – great, large, mighty, important
  adjective
• asura – demon, titan, anti-god (mythological beings often in conflict with devas)
  noun (masculine)

अभीरुः (abhīruḥ) - Abhiru (as a proper name) (fearless, brave; Abhiru (a proper name))

(adjective)

Nominative, masculine, singular of abhīru

abhīru - fearless, brave, intrepid; a proper name

Compound type : nañ-tatpuruṣa (a+bhīru)

• a – not, un-, without (negative prefix)
  prefix
• bhīru – fearful, timid, afraid
  adjective
  Root: bhī (class 3)

इति (iti) - named, as (thus, so, in this manner (marks direct speech or a name))

(indeclinable)

विख्यातः (vikhyātaḥ) - renowned (famous, renowned, well-known)

(adjective)

Nominative, masculine, singular of vikhyāta

vikhyāta - famous, renowned, celebrated, well-known

past participle

kṛt affix -ta from root khyā with prefix vi

Prefix: vi

Root: khyā (class 2)

क्षितौ (kṣitau) - on earth (on the earth, in the land)

(noun)

Locative, feminine, singular of kṣiti

kṣiti - earth, ground, land, abode

Root: kṣi (class 1)

राजर्षिसत्तमः (rājarṣisattamaḥ) - the foremost of royal sages (best among royal sages, excellent royal sage)

(noun)

Nominative, masculine, singular of rājarṣisattama

rājarṣisattama - the best of royal sages, most excellent royal sage

Compound type : tatpuruṣa (rājarṣi+sattama)

• rājarṣi – a royal sage, a king who is also a sage
  noun (masculine)
• sattama – best, most excellent, pre-eminent
  adjective
  superlative suffix -tama