महाभारतः mahābhārataḥ - book-3, chapter-179, verse-3

तपात्ययनिकेताश्च शतशोऽथ सहस्रशः ।
अपेतार्कप्रभाजालाः सविद्युद्विमलप्रभाः ॥३॥

3. tapātyayaniketāśca śataśo'tha sahasraśaḥ ,
apetārkaprabhājālāḥ savidyudvimalaprabhāḥ.

3. tapātyayaniketāḥ ca śataśaḥ atha sahasraśaḥ
apetārkaprabhājālāḥ savidyudvimalaprabhāḥ

3. And then, those hundreds and thousands of clouds, marking the end of summer, appeared with a pure, lightning-like radiance, having eclipsed the sun's myriad rays.

Words meanings summery:

• तपात्ययनिकेताः (tapātyayaniketāḥ) - (clouds) that arrive/abide at the end of summer (whose abode is at the end of summer, marking the end of summer)

• च (ca) - and

• शतशः (śataśaḥ) - by hundreds, hundreds of

• अथ (atha) - then, now, thereupon

• सहस्रशः (sahasraśaḥ) - by thousands, thousands of

• अपेतार्कप्रभाजालाः (apetārkaprabhājālāḥ) - (clouds) obscuring the sun's light (whose multitude of sun-rays has vanished, having eclipsed the sun's radiance)

• सविद्युद्विमलप्रभाः (savidyudvimalaprabhāḥ) - (clouds) possessing clean, lightning-like brilliance (with lightning and pure radiance)

Words meanings and morphology

तपात्ययनिकेताः (tapātyayaniketāḥ) - (clouds) that arrive/abide at the end of summer (whose abode is at the end of summer, marking the end of summer)

(adjective)

Nominative, masculine, plural of tapātyayaniketa

tapātyayaniketa - having the end of summer as their dwelling

Compound: tapa (heat, summer) + atyaya (end, expiry) + niketa (abode, dwelling).

Compound type : bahuvrihi (tapa+atyaya+niketa)

• tapa – heat, warmth, penance, summer
  noun (masculine)
  From root tap- (to heat)
  Root: tap (class 1)
• atyaya – end, passing away, transgression
  noun (masculine)
  From root i- (to go) with prefix ati-
  Prefix: ati
  Root: i (class 2)
• niketa – dwelling, abode, house
  noun (masculine)
  From root kit- (to dwell) with prefix ni-
  Prefix: ni
  Root: kit (class 1)

Note: Refers to clouds.

च (ca) - and

(indeclinable)

Conjunction.

शतशः (śataśaḥ) - by hundreds, hundreds of

(indeclinable)

Formed with suffix -śas from śata (hundred).

अथ (atha) - then, now, thereupon

(indeclinable)

Conjunction/adverb.

सहस्रशः (sahasraśaḥ) - by thousands, thousands of

(indeclinable)

Formed with suffix -śas from sahasra (thousand).

अपेतार्कप्रभाजालाः (apetārkaprabhājālāḥ) - (clouds) obscuring the sun's light (whose multitude of sun-rays has vanished, having eclipsed the sun's radiance)

(adjective)

Nominative, masculine, plural of apetārkaprabhājāla

apetārkaprabhājāla - whose network/multitude of sun-radiance has departed

Compound: apeta (departed) + arka (sun) + prabhā (radiance) + jāla (net, multitude).

Compound type : bahuvrihi (apeta+arka+prabhā+jāla)

• apeta – departed, gone away
  adjective (masculine)
  Past Passive Participle
  From root i- (to go) with prefix apa-
  Prefix: apa
  Root: i (class 2)
• arka – sun, ray of light
  noun (masculine)
• prabhā – light, splendor, radiance
  noun (feminine)
  Prefix: pra
  Root: bhā (class 2)
• jāla – net, multitude, collection
  noun (neuter)

Note: Refers to clouds.

सविद्युद्विमलप्रभाः (savidyudvimalaprabhāḥ) - (clouds) possessing clean, lightning-like brilliance (with lightning and pure radiance)

(adjective)

Nominative, masculine, plural of savidyudvimalaprabhā

savidyudvimalaprabhā - with lightning and pure light/radiance

Compound: sa (with) + vidyut (lightning) + vimala (spotless, pure) + prabhā (light).

Compound type : bahuvrihi (sa+vidyut+vimala+prabhā)

• sa – with, together with
  indeclinable
  Prefix/preposition indicating accompaniment.
• vidyut – lightning, electricity
  noun (feminine)
  Prefix: vi
  Root: dyut (class 1)
• vimala – spotless, pure, clean
  adjective (masculine)
  From vi- (prefix) + mala (dirt, impurity).
  Prefix: vi
• prabhā – light, splendor, radiance
  noun (feminine)
  From root bhā- (to shine) with prefix pra-.
  Prefix: pra
  Root: bhā (class 2)

Note: Refers to clouds.