महाभारतः mahābhārataḥ - book-14, chapter-49, verse-47

एवं द्वादशविस्तारं तेजसो रूपमुच्यते ।
विज्ञेयं ब्राह्मणैर्नित्यं धर्मज्ञैः सत्यवादिभिः ॥४७॥

47. evaṁ dvādaśavistāraṁ tejaso rūpamucyate ,
vijñeyaṁ brāhmaṇairnityaṁ dharmajñaiḥ satyavādibhiḥ.

47. evam dvādaśavistāram tejasaḥ rūpam ucyate vijñeyam
brāhmaṇaiḥ nityam dharmajñaiḥ satyavādibhiḥ

47. Thus, the twelve-fold manifestation of radiant energy (tejas) is described. It should always be understood by those brahmins (brāhmaṇa) who are knowledgeable in natural law (dharma) and speak the truth.

Words meanings summery:

• एवम् (evam) - thus, in this manner, so, indeed

• द्वादशविस्तारम् (dvādaśavistāram) - the twelve-fold manifestation (twelve-fold expansion, twelve-fold extent, manifestation of twelve aspects)

• तेजसः (tejasaḥ) - of radiant energy (of light, of brilliance, of radiant energy, of power)

• रूपम् (rūpam) - manifestation (form, shape, nature, manifestation)

• उच्यते (ucyate) - is described (is said, is declared, is described, is called)

• विज्ञेयम् (vijñeyam) - should be understood (to be known, should be understood, ought to be perceived)

• ब्राह्मणैः (brāhmaṇaiḥ) - by brahmins (brāhmaṇa) (by Brahmins, by those belonging to the priestly class)

• नित्यम् (nityam) - always (always, constantly, eternally, perpetually)

• धर्मज्ञैः (dharmajñaiḥ) - by those knowledgeable in natural law (dharma) (by knowers of dharma, by those familiar with natural law, by those understanding righteousness)

• सत्यवादिभिः (satyavādibhiḥ) - by those who speak the truth (by truth-speakers, by those who speak truth)

Words meanings and morphology

एवम् (evam) - thus, in this manner, so, indeed

(indeclinable)

द्वादशविस्तारम् (dvādaśavistāram) - the twelve-fold manifestation (twelve-fold expansion, twelve-fold extent, manifestation of twelve aspects)

(adjective)

Accusative, neuter, singular of dvādaśavistāra

dvādaśavistāra - having a twelve-fold extent, twelve-fold expansion

Compound type : bahuvrīhi (dvādaśa+vistāra)

• dvādaśa – twelve
  numeral
• vistāra – expansion, extent, diffusion
  noun (masculine)
  Derived from root stṛ (to spread) with prefix vi.
  Prefix: vi
  Root: stṛ (class 5)

Note: Agrees with 'rūpam', functioning as an adjective for 'rūpam'.

तेजसः (tejasaḥ) - of radiant energy (of light, of brilliance, of radiant energy, of power)

(noun)

Genitive, neuter, singular of tejas

tejas - light, brilliance, radiance, energy, spiritual power

रूपम् (rūpam) - manifestation (form, shape, nature, manifestation)

(noun)

Nominative, neuter, singular of rūpa

rūpa - form, shape, appearance, nature, manifestation

Note: Subject of the passive verb 'ucyate'.

उच्यते (ucyate) - is described (is said, is declared, is described, is called)

(verb)

3rd person , singular, passive, present (laṭ) of vac

Present tense, Ātmanepada, Passive voice

Root: vac (class 2)

विज्ञेयम् (vijñeyam) - should be understood (to be known, should be understood, ought to be perceived)

(adjective)

Nominative, neuter, singular of vijñeya

vijñeya - to be known, discernible, understandable

Gerundive

From root jñā (to know) with prefix vi-, suffix -eya.

Prefix: vi

Root: jñā (class 9)

Note: Agrees with an implied 'tat' (that) or referring back to 'rūpam', meaning 'it should be known'.

ब्राह्मणैः (brāhmaṇaiḥ) - by brahmins (brāhmaṇa) (by Brahmins, by those belonging to the priestly class)

(noun)

Instrumental, masculine, plural of brāhmaṇa

brāhmaṇa - Brahmin, one belonging to the priestly class, related to brahman

Note: Agent of the passive verb 'vijñeyam'.

नित्यम् (nityam) - always (always, constantly, eternally, perpetually)

(indeclinable)

Note: Functions as an adverb modifying 'vijñeyam'.

धर्मज्ञैः (dharmajñaiḥ) - by those knowledgeable in natural law (dharma) (by knowers of dharma, by those familiar with natural law, by those understanding righteousness)

(adjective)

Instrumental, masculine, plural of dharmajña

dharmajña - knowing dharma, skilled in law or justice, righteous

Compound type : tatpuruṣa (dharma+jña)

• dharma – natural law, constitution, righteousness, duty
  noun (masculine)
• jña – knower, understanding
  noun (masculine)
  Derived from root jñā (to know).
  Root: jñā (class 9)

Note: Qualifies 'brāhmaṇaiḥ'.

सत्यवादिभिः (satyavādibhiḥ) - by those who speak the truth (by truth-speakers, by those who speak truth)

(adjective)

Instrumental, masculine, plural of satyavādin

satyavādin - truth-speaker, truthful

Agent noun from satya (truth) + root vad (to speak).

Compound type : upapada-tatpuruṣa (satya+vādin)

• satya – truth, reality, true
  noun (neuter)
• vādin – speaking, speaker, asserting
  adjective (masculine)
  Agent Noun (affix -in)
  From root vad (to speak).
  Root: vad (class 1)

Note: Qualifies 'brāhmaṇaiḥ'.