महाभारतः mahābhārataḥ - book-3, chapter-291, verse-20

अस्तु मे संगमो देव यथोक्तं भगवंस्त्वया ।
त्वद्वीर्यरूपसत्त्वौजा धर्मयुक्तो भवेत्स च ॥२०॥

20. astu me saṁgamo deva yathoktaṁ bhagavaṁstvayā ,
tvadvīryarūpasattvaujā dharmayukto bhavetsa ca.

20. astu me saṃgamaḥ deva yathā uktam bhagavan tvayā
tvadvīryarūpasattvaujā dharmayuktaḥ bhavet saḥ ca

20. O god, let my union be as you, the venerable one (Bhagavān), have spoken. And may that son possess your virility, form, essence, and vigor, and be endowed with natural law (dharma).

Words meanings summery:

• अस्तु (astu) - let it be, may it be

• मे (me) - my, to me, for me

• संगमः (saṁgamaḥ) - sexual union (union, meeting, sexual intercourse)

• देव (deva) - O god, O divine one

• यथा (yathā) - as, just as, in the manner that

• उक्तम् (uktam) - spoken, said, declared

• भगवन् (bhagavan) - O venerable one (referring to Sūrya) (O venerable one, O blessed one)

• त्वया (tvayā) - by you

• त्वद्वीर्यरूपसत्त्वौजा (tvadvīryarūpasattvaujā) - possessing the qualities of Sūrya: virility, form, essence, and vigor (possessing your virility, form, essence, and vigor)

• धर्मयुक्तः (dharmayuktaḥ) - endowed with natural law (dharma) (endowed with natural law, righteous, principled)

• भवेत् (bhavet) - may be, should be, would be

• सः (saḥ) - he (referring to the son) (he, that)

• च (ca) - and, also, moreover

Words meanings and morphology

अस्तु (astu) - let it be, may it be

(verb)

3rd person , singular, active, imperative (loṭ) of as

Imperative (loṭ)

root 'as' (2nd class), imperative 3rd person singular active

Root: as (class 2)

मे (me) - my, to me, for me

(pronoun)

Genitive, singular of mad

mad - I, me (1st person pronoun)

संगमः (saṁgamaḥ) - sexual union (union, meeting, sexual intercourse)

(noun)

Nominative, masculine, singular of saṃgama

saṁgama - meeting, union, contact, sexual intercourse

Root: gam (class 1)

देव (deva) - O god, O divine one

(noun)

Vocative, masculine, singular of deva

deva - god, deity, divine being

यथा (yathā) - as, just as, in the manner that

(indeclinable)

उक्तम् (uktam) - spoken, said, declared

(adjective)

Nominative, neuter, singular of ukta

ukta - spoken, said, declared

Past Passive Participle

From root 'vac' (to speak)

Root: vac (class 2)

भगवन् (bhagavan) - O venerable one (referring to Sūrya) (O venerable one, O blessed one)

(adjective)

Vocative, masculine, singular of bhagavat

bhagavat - venerable, blessed, glorious, divine, lord

त्वया (tvayā) - by you

(pronoun)

Instrumental, singular of yuṣmad

yuṣmad - you (2nd person pronoun)

त्वद्वीर्यरूपसत्त्वौजा (tvadvīryarūpasattvaujā) - possessing the qualities of Sūrya: virility, form, essence, and vigor (possessing your virility, form, essence, and vigor)

(adjective)

Nominative, masculine, singular of tvadvīryarūpasattvojas

tvadvīryarūpasattvojas - having your virility, form, essence, and vigor

Compound type : bahuvrīhi (tvad+vīrya+rūpa+sattva+ojas)

• tvad – you (stem for 2nd person pronoun)
  pronoun
• vīrya – virility, heroism, energy, valor
  noun (neuter)
• rūpa – form, shape, beauty, appearance
  noun (neuter)
• sattva – essence, nature, existence, purity, courage, goodness
  noun (neuter)
• ojas – vigor, energy, vitality, strength
  noun (neuter)

धर्मयुक्तः (dharmayuktaḥ) - endowed with natural law (dharma) (endowed with natural law, righteous, principled)

(adjective)

Nominative, masculine, singular of dharmayukta

dharmayukta - joined with dharma, righteous, virtuous

Compound type : tatpuruṣa (dharma+yukta)

• dharma – natural law, righteousness, duty, virtue, intrinsic nature
  noun (masculine)
• yukta – joined, united, endowed with, engaged in, appropriate
  adjective (masculine)
  Past Passive Participle
  From root 'yuj' (to join)
  Root: yuj (class 7)

भवेत् (bhavet) - may be, should be, would be

(verb)

3rd person , singular, active, potential (vidhi-liṅ) of bhū

Potential (vidhi-liṅ)

root 'bhū' (1st class), potential 3rd person singular active

Root: bhū (class 1)

सः (saḥ) - he (referring to the son) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

च (ca) - and, also, moreover

(indeclinable)