महाभारतः mahābhārataḥ - book-1, chapter-166, verse-13

ततः स बुबुधे पश्चात्तमृषिं नृपसत्तमः ।
ऋषेः पुत्रं वसिष्ठस्य वसिष्ठमिव तेजसा ॥१३॥

13. tataḥ sa bubudhe paścāttamṛṣiṁ nṛpasattamaḥ ,
ṛṣeḥ putraṁ vasiṣṭhasya vasiṣṭhamiva tejasā.

13. tataḥ saḥ bubudhe paścāt tam ṛṣim nṛpasattamaḥ
ṛṣeḥ putram vasiṣṭhasya vasiṣṭham iva tejasā

13. Then, later, that excellent king understood that sage to be the son of the sage Vasiṣṭha, who was like Vasiṣṭha himself in splendor.

Words meanings summery:

• ततः (tataḥ) - then (then, from there, thereafter)

• सः (saḥ) - he (the king) (he, that)

• बुबुधे (bubudhe) - understood (understood, became aware, awoke)

• पश्चात् (paścāt) - later (after, afterwards, later, behind)

• तम् (tam) - that (sage) (him, that)

• ऋषिम् (ṛṣim) - sage, seer, inspired poet

• नृपसत्तमः (nṛpasattamaḥ) - excellent king (best of kings, excellent king, foremost among kings)

• ऋषेः (ṛṣeḥ) - of the sage (of the sage, from the sage)

• पुत्रम् (putram) - son

• वसिष्ठस्य (vasiṣṭhasya) - of Vasiṣṭha

• वसिष्ठम् (vasiṣṭham) - Vasiṣṭha

• इव (iva) - like (like, as, as if)

• तेजसा (tejasā) - in splendor (by splendor, by power, by energy, by fiery spirit)

Words meanings and morphology

ततः (tataḥ) - then (then, from there, thereafter)

(indeclinable)

सः (saḥ) - he (the king) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

बुबुधे (bubudhe) - understood (understood, became aware, awoke)

(verb)

3rd person , singular, middle, perfect (lit) of budh

Perfect Tense

reduplicated perfect form

Root: budh (class 1)

पश्चात् (paścāt) - later (after, afterwards, later, behind)

(indeclinable)

तम् (tam) - that (sage) (him, that)

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, she, it

ऋषिम् (ṛṣim) - sage, seer, inspired poet

(noun)

Accusative, masculine, singular of ṛṣi

ṛṣi - sage, seer, inspired poet

नृपसत्तमः (nṛpasattamaḥ) - excellent king (best of kings, excellent king, foremost among kings)

(noun)

Nominative, masculine, singular of nṛpasattama

nṛpasattama - best of kings, excellent king, foremost among kings

Compound type : tatpuruṣa (nṛpa+sattama)

• nṛpa – king, protector of men
  noun (masculine)
• sattama – best, most excellent, supreme
  adjective (masculine)
  superlative suffix -tama

ऋषेः (ṛṣeḥ) - of the sage (of the sage, from the sage)

(noun)

Genitive, masculine, singular of ṛṣi

ṛṣi - sage, seer, inspired poet

पुत्रम् (putram) - son

(noun)

Accusative, masculine, singular of putra

putra - son, child

वसिष्ठस्य (vasiṣṭhasya) - of Vasiṣṭha

(proper noun)

Genitive, masculine, singular of vasiṣṭha

vasiṣṭha - Vasiṣṭha (name of a prominent Vedic sage)

वसिष्ठम् (vasiṣṭham) - Vasiṣṭha

(proper noun)

Accusative, masculine, singular of vasiṣṭha

vasiṣṭha - Vasiṣṭha (name of a prominent Vedic sage)

इव (iva) - like (like, as, as if)

(indeclinable)

तेजसा (tejasā) - in splendor (by splendor, by power, by energy, by fiery spirit)

(noun)

Instrumental, neuter, singular of tejas

tejas - splendor, brilliance, power, energy, fiery spirit