योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-38, verse-36

केशशैवालवक्राब्जचक्रावर्तनदीशतम् ।
तरत्तुङ्गतरङ्गाढ्यवहद्रक्तमहानदम् ॥ ३६ ॥

keśaśaivālavakrābjacakrāvartanadīśatam ,
tarattuṅgataraṅgāḍhyavahadraktamahānadam 36

36. keśaśaivālavakrābjacakrāvartanadīśatam
tarattuṅgatarangāḍhyavahadraktamahānadam

36. tarattuṅgatarangāḍhyavahadraktamahānadam
keśaśaivālavakrābjacakrāvartanadīśatam

36. (It was) a great river of flowing blood, rich with high, surging waves, which appeared like hundreds of rivers with hair resembling algae, crooked lotus-like faces, and wheels as swirling eddies.

Words meanings summery:

• केशशैवालवक्राब्जचक्रावर्तनदीशतम् (keśaśaivālavakrābjacakrāvartanadīśatam) - describing the horrific features of the river of blood (having hundreds of rivers where hair is like algae, crooked lotus-like faces (abja), and wheels are like whirlpools)

• तरत्तुङ्गतरन्गाढ्यवहद्रक्तमहानदम् (tarattuṅgatarangāḍhyavahadraktamahānadam) - describing the main characteristic of the horrifying river (a great river of flowing blood, abundant with high, surging waves)

Words meanings and morphology

केशशैवालवक्राब्जचक्रावर्तनदीशतम् (keśaśaivālavakrābjacakrāvartanadīśatam) - describing the horrific features of the river of blood (having hundreds of rivers where hair is like algae, crooked lotus-like faces (abja), and wheels are like whirlpools)

(adjective)

Accusative, neuter, singular of keśaśaivālavakrābjacakrāvartanadīśata

keśaśaivālavakrābjacakrāvartanadīśata - characterized by hundreds of rivers having hair like algae, crooked lotus-like faces, and wheels as whirlpools

Compound type : Bahuvrihi (descriptive) (keśa+śaivāla+vakra+abja+cakra+āvarta+nadī+śata)

• keśa – hair
  noun (masculine)
• śaivāla – algae, moss
  noun (neuter)
• vakra – crooked, curved, bent
  adjective
• abja – lotus; born from water
  noun (neuter)
• cakra – wheel, disc, circle
  noun (neuter)
• āvarta – whirlpool, eddy, turning, revolving
  noun (masculine)
• nadī – river
  noun (feminine)
• śata – hundred
  noun (neuter)

Note: A long descriptive compound in accusative singular neuter, modifying an implied noun like 'scene' or 'sight'.

तरत्तुङ्गतरन्गाढ्यवहद्रक्तमहानदम् (tarattuṅgatarangāḍhyavahadraktamahānadam) - describing the main characteristic of the horrifying river (a great river of flowing blood, abundant with high, surging waves)

(adjective)

Accusative, neuter, singular of tarattuṅgatarangāḍhyavahadraktamahānada

tarattuṅgatarangāḍhyavahadraktamahānada - a great river of flowing blood, abundant with high, surging waves

Compound type : Descriptive Tatpurusha (tarat+tuṅga+taraṅga+āḍhya+vahat+rakta+mahānada)

• tarat – surging, moving, crossing
  adjective
  Present Active Participle
  Derived from root tṛ (to cross, pass over, move rapidly)
  Root: tṛ (class 1)
• tuṅga – high, lofty, elevated
  adjective
• taraṅga – wave, billow, surge
  noun (masculine)
• āḍhya – rich in, abundant with, wealthy
  adjective
• vahat – flowing, carrying, bearing
  adjective
  Present Active Participle
  Derived from root vah (to carry, flow)
  Root: vah (class 1)
• rakta – blood; red; dyed
  noun (neuter)
• mahānada – great river
  noun (masculine)

Note: A long descriptive compound in accusative singular neuter, modifying an implied noun like 'scene' or 'sight'.