महाभारतः mahābhārataḥ - book-12, chapter-304, verse-19

निवाते तु यथा दीपो ज्वलेत्स्नेहसमन्वितः ।
निश्चलोर्ध्वशिखस्तद्वद्युक्तमाहुर्मनीषिणः ॥१९॥

19. nivāte tu yathā dīpo jvaletsnehasamanvitaḥ ,
niścalordhvaśikhastadvadyuktamāhurmanīṣiṇaḥ.

19. nivāte tu yathā dīpaḥ jvalet snehasamanvitaḥ
niścalordhvaśikhaḥ tadvat yuktam āhuḥ manīṣiṇaḥ

19. tu yathā nivāte snehasamanvitaḥ dīpaḥ
niścalordhvaśikhaḥ jvalet tadvat manīṣiṇaḥ yuktam āhuḥ

19. Just as a lamp, well-supplied with oil, burns with a steady, upward flame in a windless place, so too do the wise (manīṣiṇaḥ) describe a person established in spiritual discipline (yoga).

Words meanings summery:

• निवाते (nivāte) - in a windless place, in a calm spot

• तु (tu) - but, indeed, yet

• यथा (yathā) - just as, as, in which way

• दीपः (dīpaḥ) - a lamp, light

• ज्वलेत् (jvalet) - should burn, he/she/it should shine

• स्नेहसमन्वितः (snehasamanvitaḥ) - accompanied by oil, well-supplied with oil

• निश्चलोर्ध्वशिखः (niścalordhvaśikhaḥ) - with a steady, upward flame

• तद्वत् (tadvat) - similarly, in the same way, like that

• युक्तम् (yuktam) - a person established in spiritual discipline (yoga) (one established in yoga, connected, joined, fit)

• आहुः (āhuḥ) - they say, they speak

• मनीषिणः (manīṣiṇaḥ) - the wise, sagacious ones, thinkers

Words meanings and morphology

निवाते (nivāte) - in a windless place, in a calm spot

(noun)

Locative, masculine, singular of nivāta

nivāta - windless, calm, a place sheltered from wind

From ni (down, without) + vāta (wind)

तु (tu) - but, indeed, yet

(indeclinable)

यथा (yathā) - just as, as, in which way

(indeclinable)

दीपः (dīpaḥ) - a lamp, light

(noun)

Nominative, masculine, singular of dīpa

dīpa - lamp, light, source of illumination

From root dīp (to shine)

Root: dīp (class 4)

ज्वलेत् (jvalet) - should burn, he/she/it should shine

(verb)

3rd person , singular, active, optative (vidhi liṅ) of jval

optative mood, third person singular, active voice

Root: jval (class 1)

स्नेहसमन्वितः (snehasamanvitaḥ) - accompanied by oil, well-supplied with oil

(adjective)

Nominative, masculine, singular of snehasamanvita

snehasamanvita - accompanied by oil/affection, endowed with oil/affection

Tatpuruṣa compound: sneha (oil/affection) + samanvita (accompanied by, endowed with)

Compound type : tatpuruṣa (sneha+samanvita)

• sneha – oil, fat, unctuousness, affection, love
  noun (masculine)
  Root: snih (class 4)
• samanvita – accompanied by, endowed with, possessed of
  adjective (masculine)
  past passive participle
  From sam-anv-i (to follow, to be connected with)
  Prefixes: sam+anu
  Root: i (class 2)

निश्चलोर्ध्वशिखः (niścalordhvaśikhaḥ) - with a steady, upward flame

(adjective)

Nominative, masculine, singular of niścalordhvaśikha

niścalordhvaśikha - with a motionless and upward flame

Karmadhāraya compound of niścala (motionless) and ūrdhvaśikha (upward flame)

Compound type : karmadhāraya (niścala+ūrdhvaśikha)

• niścala – motionless, steady, unwavering
  adjective (masculine)
  From nir (without) + cala (moving)
  Prefix: nis
  Root: cal (class 1)
• ūrdhvaśikha – having an upward flame
  adjective (masculine)
  Bahuvrīhi compound: ūrdhva (upward) + śikhā (flame)

तद्वत् (tadvat) - similarly, in the same way, like that

(indeclinable)

युक्तम् (yuktam) - a person established in spiritual discipline (yoga) (one established in yoga, connected, joined, fit)

(adjective)

Accusative, neuter, singular of yukta

yukta - joined, united, engaged in, in yoga, fit, proper

past passive participle

From root yuj (to join, connect), with passive meaning

Root: yuj (class 7)

आहुः (āhuḥ) - they say, they speak

(verb)

3rd person , plural, active, perfect (lit) of ah

perfect tense, third person plural, active voice

Irregular perfect forms of root brū or ah

Root: brū (class 2)

मनीषिणः (manīṣiṇaḥ) - the wise, sagacious ones, thinkers

(noun)

Nominative, masculine, plural of manīṣin

manīṣin - wise, sagacious, thoughtful, a sage, a thinker

From manīṣā (intellect, wisdom)