योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-111, verse-27

अशनीनां च सरितो विद्युतां सरितस्तथा ।
जलधारासरित्पूराः खङ्गवर्षसमन्विताः ॥ २७ ॥

aśanīnāṃ ca sarito vidyutāṃ saritastathā ,
jaladhārāsaritpūrāḥ khaṅgavarṣasamanvitāḥ 27

27. aśanīnām ca saritaḥ vidyutām saritaḥ tathā
jaladhārāsaritpūrāḥ khaṅgavarṣasamannvitāḥ

27. aśanīnām saritaḥ ca,
vidyutām saritaḥ tathā,
khaṅgavarṣasamannvitāḥ jaladhārāsaritpūrāḥ (babhūvuḥ)

27. And rivers of thunderbolts, and likewise rivers of lightning flashes; floods like rivers of water-streams, accompanied by a rain of swords.

Words meanings summery:

• अशनीनाम् (aśanīnām) - of thunderbolts (of thunderbolts, of lightning)

• च (ca) - and (and, also)

• सरितः (saritaḥ) - rivers (rivers, streams)

• विद्युताम् (vidyutām) - of lightning flashes (of lightning, of flashes)

• सरितः (saritaḥ) - rivers (rivers, streams)

• तथा (tathā) - likewise, also (so, thus, likewise, also)

• जलधारासरित्पूराः (jaladhārāsaritpūrāḥ) - floods that are like rivers of continuous water streams (floods like rivers of water-streams)

• खङ्गवर्षसमन्न्विताः (khaṅgavarṣasamannvitāḥ) - (these floods/rivers are) accompanied by a shower of swords (accompanied by a rain of swords)

Words meanings and morphology

अशनीनाम् (aśanīnām) - of thunderbolts (of thunderbolts, of lightning)

(noun)

Genitive, feminine, plural of aśani

aśani - thunderbolt, lightning; a weapon

च (ca) - and (and, also)

(indeclinable)

सरितः (saritaḥ) - rivers (rivers, streams)

(noun)

Nominative, feminine, plural of sarit

sarit - river, stream; torrent

Root: sṛ (class 1)

विद्युताम् (vidyutām) - of lightning flashes (of lightning, of flashes)

(noun)

Genitive, feminine, plural of vidyut

vidyut - lightning, flash of lightning; electricity

Root: dyut (class 1)

सरितः (saritaḥ) - rivers (rivers, streams)

(noun)

Nominative, feminine, plural of sarit

sarit - river, stream; torrent

Root: sṛ (class 1)

तथा (tathā) - likewise, also (so, thus, likewise, also)

(indeclinable)

जलधारासरित्पूराः (jaladhārāsaritpūrāḥ) - floods that are like rivers of continuous water streams (floods like rivers of water-streams)

(noun)

Nominative, masculine, plural of jaladhārāsaritpūra

jaladhārāsaritpūra - a flood of rivers of water-streams

Compound type : tatpuruṣa (jaladhārā+sarit+pūra)

• jala – water
  noun (neuter)
• dhārā – stream, current, flow; shower
  noun (feminine)
• sarit – river, stream
  noun (feminine)
  Root: sṛ (class 1)
• pūra – flood, current, stream; abundance
  noun (masculine)
  Root: pṝ (class 9)

Note: This word acts as the subject, described by 'khaṅgavarṣasamannvitāḥ'.

खङ्गवर्षसमन्न्विताः (khaṅgavarṣasamannvitāḥ) - (these floods/rivers are) accompanied by a shower of swords (accompanied by a rain of swords)

(adjective)

Nominative, masculine, plural of khaṅgavarṣasamannvita

khaṅgavarṣasamannvita - accompanied by a rain of swords

Past Passive Participle

Compound: khaṅgavarṣa (rain of swords) + samannvita (accompanied). samannvita is a past passive participle of sam-anu-i (to go, to follow).

Compound type : tatpuruṣa (khaṅgavarṣa+samannvita)

• khaṅga – a sword, scimitar
  noun (masculine)
• varṣa – rain, shower; year
  noun (masculine)
  Root: vṛṣ (class 1)
• samannvita – accompanied, endowed with, possessed of
  adjective (masculine)
  Past Passive Participle
  Derived from sam-anu-i (to go, to follow).
  Prefixes: sam+anu
  Root: i (class 2)

Note: Qualifies 'jaladhārāsaritpūrāḥ'.