महाभारतः mahābhārataḥ - book-12, chapter-310, verse-23

जटाश्च तेजसा तस्य वैश्वानरशिखोपमाः ।
प्रज्वलन्त्यः स्म दृश्यन्ते युक्तस्यामिततेजसः ॥२३॥

23. jaṭāśca tejasā tasya vaiśvānaraśikhopamāḥ ,
prajvalantyaḥ sma dṛśyante yuktasyāmitatejasaḥ.

23. jaṭāḥ ca tejasā tasya vaiśvānaraśikhopamāḥ
prajvalantyaḥ sma dṛśyante yuktasya amitatejasaḥ

23. tasya yuktasya amitatejasaḥ jaṭāḥ ca
vaiśvānaraśikhopamāḥ prajvalantyaḥ tejasā sma dṛśyante

23. His matted locks, blazing like the flames of the universal fire, were seen, radiant with his splendor, as he was absorbed in meditative practice (yoga) and possessed immeasurable energy.

Words meanings summery:

• जटाः (jaṭāḥ) - matted locks (of an ascetic/Yogin) (matted hair, braided hair, ascetic's locks)

• च (ca) - and (and, also, moreover)

• तेजसा (tejasā) - by his splendor/radiance (by splendor, by radiance, by energy)

• तस्य (tasya) - his (referring to the person in the verse) (of him, his, of that)

• वैश्वानरशिखोपमाः (vaiśvānaraśikhopamāḥ) - resembling the flames of the universal fire (resembling the flames of Vaiśvānara (the universal fire))

• प्रज्वलन्त्यः (prajvalantyaḥ) - blazing (describing the matted locks) (blazing, burning brightly, shining)

• स्म (sma) - (particle indicating past tense) (particle used with present tense to indicate past action, indeed, surely)

• दृश्यन्ते (dṛśyante) - they were seen (they are seen, appear)

• युक्तस्य (yuktasya) - of the one absorbed in meditation (yoga) (of the yoked, of the joined, of the concentrated, of the one engaged in yoga)

• अमिततेजसः (amitatejasaḥ) - of immeasurable energy/radiance (of immeasurable splendor, of boundless energy)

Words meanings and morphology

जटाः (jaṭāḥ) - matted locks (of an ascetic/Yogin) (matted hair, braided hair, ascetic's locks)

(noun)

Nominative, feminine, plural of jaṭā

jaṭā - matted hair, braided hair, ascetic's locks, root of a tree

च (ca) - and (and, also, moreover)

(indeclinable)

तेजसा (tejasā) - by his splendor/radiance (by splendor, by radiance, by energy)

(noun)

Instrumental, neuter, singular of tejas

tejas - sharpness, brilliance, splendor, energy, virility, fire, essence

तस्य (tasya) - his (referring to the person in the verse) (of him, his, of that)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

Note: masculine form of tad

वैश्वानरशिखोपमाः (vaiśvānaraśikhopamāḥ) - resembling the flames of the universal fire (resembling the flames of Vaiśvānara (the universal fire))

(adjective)

Nominative, feminine, plural of vaiśvānaraśikhopama

vaiśvānaraśikhopama - resembling the flames of Vaiśvānara

Compound type : bahuvrihi (vaiśvānara+śikhā+upama)

• vaiśvānara – universal, relating to all men, the universal fire, Agni
  proper noun (masculine)
  from viśva + nara
• śikhā – point, peak, flame, crest, top-knot
  noun (feminine)
• upama – likeness, comparison, resembling, equal to
  adjective (feminine)
  Prefix: upa
  Root: mā (class 3)

Note: compound adjective qualifying jaṭāḥ

प्रज्वलन्त्यः (prajvalantyaḥ) - blazing (describing the matted locks) (blazing, burning brightly, shining)

(adjective)

Nominative, feminine, plural of prajvalant

prajvalant - blazing, shining

Present Active Participle

from pra- √jval (1P)

Prefix: pra

Root: jval (class 1)

Note: qualifies jaṭāḥ

स्म (sma) - (particle indicating past tense) (particle used with present tense to indicate past action, indeed, surely)

(indeclinable)

दृश्यन्ते (dṛśyante) - they were seen (they are seen, appear)

(verb)

3rd person , plural, passive, present (laṭ) of dṛś

Root: dṛś (class 1)

Note: used with 'sma' to denote past tense

युक्तस्य (yuktasya) - of the one absorbed in meditation (yoga) (of the yoked, of the joined, of the concentrated, of the one engaged in yoga)

(adjective)

Genitive, masculine, singular of yukta

yukta - joined, yoked, connected, prepared, intent, absorbed, engaged in yoga

Past Passive Participle

from √yuj (7A)

Root: yuj (class 7)

Note: qualifies the implied 'man', linked to 'tasya' and 'amitatejasaḥ'

अमिततेजसः (amitatejasaḥ) - of immeasurable energy/radiance (of immeasurable splendor, of boundless energy)

(adjective)

Genitive, masculine, singular of amitatejas

amitatejas - of immeasurable splendor/energy

Compound type : bahuvrihi (amita+tejas)

• amita – unmeasured, immeasurable, boundless
  adjective
  Past Passive Participle
  from a + √mā (2P)
  Prefix: a
  Root: mā (class 2)
• tejas – sharpness, brilliance, splendor, energy, virility, fire, essence
  noun (neuter)

Note: qualifies the implied 'man', linked to 'tasya' and 'yuktasya'