योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-26, verse-4

दहत्यन्तर्दुराशाभिर्देवो दारुणचेष्टया ।
लोकमुष्णप्रकाशाभिज्वालाभिर्दहनो यथा ॥ ४ ॥

dahatyantardurāśābhirdevo dāruṇaceṣṭayā ,
lokamuṣṇaprakāśābhijvālābhirdahano yathā 4

4. dahati antaḥ durāśābhiḥ devaḥ dāruṇa-ceṣṭayā
lokam uṣṇa-prakāśābhiḥ jvālābhiḥ dahanaḥ yathā

4. yathā dahanaḥ uṣṇa-prakāśābhiḥ jvālābhiḥ (lokam dahati),
tathā devaḥ dāruṇa-ceṣṭayā antaḥ durāśābhiḥ lokam dahati.

4. The divine force (deva) burns people internally with wicked desires through its cruel activities, just as fire (dahana) burns with hot, luminous flames.

Words meanings summery:

• दहति (dahati) - burns, consumes

• अन्तः (antaḥ) - inside, internally

• दुराशाभिः (durāśābhiḥ) - with wicked desires, with evil hopes

• देवः (devaḥ) - the divine force (deva) (god, deity, divine power)

• दारुण-चेष्टया (dāruṇa-ceṣṭayā) - through its cruel activities (by terrible action, by fierce exertion)

• लोकम् (lokam) - people (the world, people)

• उष्ण-प्रकाशाभिः (uṣṇa-prakāśābhiḥ) - hot, luminous (qualifying flames) (with hot and bright (things))

• ज्वालाभिः (jvālābhiḥ) - with flames, by means of flames

• दहनः (dahanaḥ) - fire (dahana) (fire, the burner)

• यथा (yathā) - just as, as

Words meanings and morphology

दहति (dahati) - burns, consumes

(verb)

3rd person , singular, active, present (laṭ) of dah

Root: dah (class 1)

Note: Main verb of the sentence.

अन्तः (antaḥ) - inside, internally

(indeclinable)

Note: Modifies dahati.

दुराशाभिः (durāśābhiḥ) - with wicked desires, with evil hopes

(noun)

Instrumental, feminine, plural of durāśā

durāśā - wicked desire, evil hope

Compound type : prādi-samāsa (dur+āśā)

• dur – bad, evil, difficult
  indeclinable
  prefix indicating negativity or difficulty
• āśā – hope, desire, expectation
  noun (feminine)
  from root aś (to reach, obtain)
  Prefix: ā
  Root: aś (class 5)

Note: Instrument of burning.

देवः (devaḥ) - the divine force (deva) (god, deity, divine power)

(noun)

Nominative, masculine, singular of deva

deva - god, deity, divine being

from root div (to shine)

Root: div (class 4)

Note: Subject of the first clause.

दारुण-चेष्टया (dāruṇa-ceṣṭayā) - through its cruel activities (by terrible action, by fierce exertion)

(noun)

Instrumental, feminine, singular of dāruṇaceṣṭā

dāruṇaceṣṭā - terrible/fierce activity/exertion

Compound type : karmadhāraya (dāruṇa+ceṣṭā)

• dāruṇa – terrible, cruel, harsh
  adjective (neuter)
• ceṣṭā – activity, exertion, endeavor
  noun (feminine)
  from root ceṣṭ (to move, act)
  Root: ceṣṭ (class 1)

Note: The manner or instrument of the deva's action.

लोकम् (lokam) - people (the world, people)

(noun)

Accusative, masculine, singular of loka

loka - world, people, community

Note: Object of dahati.

उष्ण-प्रकाशाभिः (uṣṇa-prakāśābhiḥ) - hot, luminous (qualifying flames) (with hot and bright (things))

(adjective)

Instrumental, feminine, plural of uṣṇaprakāśa

uṣṇaprakāśa - hot and shining, luminous with heat

Compound type : dvandva (uṣṇa+prakāśa)

• uṣṇa – hot, warm
  adjective (neuter)
• prakāśa – light, brightness, shining
  noun (masculine)
  from pra-kāś (to shine forth)
  Prefix: pra
  Root: kāś (class 1)

Note: Qualifies jvālābhiḥ.

ज्वालाभिः (jvālābhiḥ) - with flames, by means of flames

(noun)

Instrumental, feminine, plural of jvālā

jvālā - flame, blaze

from root jval (to burn, blaze)

Root: jval (class 1)

Note: Instrument of burning (by the fire).

दहनः (dahanaḥ) - fire (dahana) (fire, the burner)

(noun)

Nominative, masculine, singular of dahana

dahana - fire, burning, Agni (god of fire)

from root dah (to burn)

Root: dah (class 1)

Note: Subject of the comparison clause.

यथा (yathā) - just as, as

(indeclinable)