योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-17, verse-40

क्षणमालोकविमला सान्धकारलवा क्षणम् ।
व्योमवीथ्युपमा तृष्णा नीहारगहना क्षणम् ॥ ४० ॥

kṣaṇamālokavimalā sāndhakāralavā kṣaṇam ,
vyomavīthyupamā tṛṣṇā nīhāragahanā kṣaṇam 40

40. kṣaṇam ālokavimalā sāndhakāralavā kṣaṇam
vyomavīthyupamā tṛṣṇā nīhāragahanā kṣaṇam

40. Desire (tṛṣṇā) is, for a moment, pure and radiant like light, then for another moment, it is tinged with a patch of darkness. Like a path in the sky, it is also, at times, dense with mist.

Words meanings summery:

• क्षणम् (kṣaṇam) - for a moment, in an instant

• आलोकविमला (ālokavimalā) - pure and bright like light

• सान्धकारलवा (sāndhakāralavā) - having a patch of darkness, tinged with darkness

• क्षणम् (kṣaṇam) - for a moment, in an instant

• व्योमवीथ्युपमा (vyomavīthyupamā) - comparable to a path in the sky, like a sky-path

• तृष्णा (tṛṣṇā) - thirst, desire, craving

• नीहारगहना (nīhāragahanā) - dense with mist, obscured by fog

• क्षणम् (kṣaṇam) - for a moment, in an instant

Words meanings and morphology

क्षणम् (kṣaṇam) - for a moment, in an instant

(indeclinable)

Note: Accusative singular used adverbially.

आलोकविमला (ālokavimalā) - pure and bright like light

(adjective)

Nominative, feminine, singular of ālokavimalā

ālokavimalā - pure like light, spotless due to brightness

Compound type : tatpurusha (āloka+vimalā)

• āloka – light, sight, vision
  noun (masculine)
  Root: lok (class 10)
• vimalā – pure, clean, spotless, free from dirt
  adjective (feminine)
  Prefix: vi
  Root: mal (class 1)

सान्धकारलवा (sāndhakāralavā) - having a patch of darkness, tinged with darkness

(adjective)

Nominative, feminine, singular of sāndhakāralavā

sāndhakāralavā - having a portion of darkness, partly dark

Compound type : bahuvrihi (sa+andhakāra+lava)

• sa – with, together with, possessing
  indeclinable
• andhakāra – darkness, gloom
  noun (masculine)
• lava – a piece, fragment, portion, particle
  noun (masculine)
  Root: lū (class 9)

क्षणम् (kṣaṇam) - for a moment, in an instant

(indeclinable)

Note: Accusative singular used adverbially.

व्योमवीथ्युपमा (vyomavīthyupamā) - comparable to a path in the sky, like a sky-path

(noun)

Nominative, feminine, singular of vyomavīthyupamā

vyomavīthyupamā - comparable to a path in the sky, a simile of a sky-path

Compound type : tatpurusha (vyoman+vīthi+upamā)

• vyoman – sky, atmosphere, heaven
  noun (neuter)
• vīthi – path, street, row, range
  noun (feminine)
• upamā – comparison, simile, resemblance
  noun (feminine)
  Prefix: upa
  Root: mā (class 2)

तृष्णा (tṛṣṇā) - thirst, desire, craving

(noun)

Nominative, feminine, singular of tṛṣṇā

tṛṣṇā - thirst, desire, craving, longing, greed

Root: tṛṣ (class 4)

नीहारगहना (nīhāragahanā) - dense with mist, obscured by fog

(adjective)

Nominative, feminine, singular of nīhāragahanā

nīhāragahanā - dense with mist, covered by fog

Compound type : tatpurusha (nīhāra+gahanā)

• nīhāra – mist, fog, dew
  noun (masculine)
• gahanā – dense, thick, impenetrable, deep
  adjective (feminine)

क्षणम् (kṣaṇam) - for a moment, in an instant

(indeclinable)

Note: Accusative singular used adverbially.