महाभारतः mahābhārataḥ - book-1, chapter-19, verse-16

गम्भीरं तिमिमकरोग्रसंकुलं तं गर्जन्तं जलचररावरौद्रनादैः ।
विस्तीर्णं ददृशतुरम्बरप्रकाशं तेऽगाधं निधिमुरुमम्भसामनन्तम् ॥१६॥

16. gambhīraṁ timimakarograsaṁkulaṁ taṁ; garjantaṁ jalacararāvaraudranādaiḥ ,
vistīrṇaṁ dadṛśaturambaraprakāśaṁ; te'gādhaṁ nidhimurumambhasāmanantam.

16. gambhīram timimakarograsaṅkulam tam
garjantam jalacarāvaraudranādaiḥ
vistīrṇam dadṛśatuḥ ambaraprakāśam te
agādham nidhim urum ambhasām anantam

16. They both saw that great, deep, unfathomable, and boundless reservoir of waters, crowded with fierce whales and crocodiles. It roared with the terrifying cries of aquatic creatures and shone with the brilliance of the sky.

Words meanings summery:

• गम्भीरम् (gambhīram) - deep (deep, profound)

• तिमिमकरोग्रसङ्कुलम् (timimakarograsaṅkulam) - teeming with ferocious marine life (crowded with fierce whales and crocodiles)

• तम् (tam) - that (ocean) (that (masculine accusative singular))

• गर्जन्तम् (garjantam) - roaring (roaring, thundering)

• जलचरावरौद्रनादैः (jalacarāvaraudranādaiḥ) - with terrifying sounds made by aquatic creatures (with terrifying cries of aquatic animals)

• विस्तीर्णम् (vistīrṇam) - vast (vast, extensive)

• ददृशतुः (dadṛśatuḥ) - they both saw (they two saw/beheld)

• अम्बरप्रकाशम् (ambaraprakāśam) - shining like the sky (shining like the sky, of sky-like brilliance)

• ते (te) - they both (the observers) (those two (nominative dual))

• अगाधम् (agādham) - unfathomable (unfathomable, very deep)

• निधिम् (nidhim) - vast reservoir (of waters), ocean (treasure, reservoir, receptacle)

• उरुम् (urum) - great (great, vast, wide)

• अम्भसाम् (ambhasām) - of waters

• अनन्तम् (anantam) - boundless (endless, infinite, boundless)

Words meanings and morphology

गम्भीरम् (gambhīram) - deep (deep, profound)

(adjective)

Accusative, masculine, singular of gambhīra

gambhīra - deep, profound, serious

Note: Modifies 'nidhim'.

तिमिमकरोग्रसङ्कुलम् (timimakarograsaṅkulam) - teeming with ferocious marine life (crowded with fierce whales and crocodiles)

(adjective)

Accusative, masculine, singular of timimakarograsaṅkula

timimakarograsaṅkula - filled/crowded with fierce whales and crocodiles

Compound type : tatpuruṣa (timi+makara+ugra+saṅkula)

• timi – whale
  noun (masculine)
• makara – crocodile, sea-monster
  noun (masculine)
• ugra – fierce, dreadful, terrible
  adjective (masculine/feminine/neuter)
• saṅkula – crowded, full of, confused
  adjective (masculine/feminine/neuter)

Note: Modifies 'nidhim'.

तम् (tam) - that (ocean) (that (masculine accusative singular))

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, she, it

Note: Modifies 'nidhim'.

गर्जन्तम् (garjantam) - roaring (roaring, thundering)

(nominal form)

Accusative, masculine, singular of garjat

garjat - roaring, thundering

present participle

Derived from root garj (to roar) + śatṛ suffix.

Root: garj (class 1)

Note: Modifies 'nidhim'.

जलचरावरौद्रनादैः (jalacarāvaraudranādaiḥ) - with terrifying sounds made by aquatic creatures (with terrifying cries of aquatic animals)

(noun)

Instrumental, masculine, plural of jalacarāvaraudranāda

jalacarāvaraudranāda - terrifying sounds of aquatic animals

Compound type : tatpuruṣa (jalacara+ārava+raudra+nāda)

• jalacara – aquatic creature
  noun (masculine)
• ārava – cry, sound, roar
  noun (masculine)
• raudra – terrible, fierce, dreadful
  adjective (masculine/feminine/neuter)
• nāda – sound, roar
  noun (masculine)

Note: Instrumental plural indicating the means by which the ocean roars.

विस्तीर्णम् (vistīrṇam) - vast (vast, extensive)

(adjective)

Accusative, masculine, singular of vistīrṇa

vistīrṇa - vast, extensive, spread out, wide

past participle

Past participle from root stṝ (to spread) with prefix vi.

Root: stṝ (class 9)

Note: Modifies 'nidhim'.

ददृशतुः (dadṛśatuḥ) - they both saw (they two saw/beheld)

(verb)

3rd person , dual, active, past perfect (lit) of dṛś

perfect tense

Perfect tense, 3rd person dual, Parasmaipada.

Root: dṛś (class 1)

अम्बरप्रकाशम् (ambaraprakāśam) - shining like the sky (shining like the sky, of sky-like brilliance)

(adjective)

Accusative, masculine, singular of ambaraprakāśa

ambaraprakāśa - sky-like brilliance, shining like the sky

Compound type : ṣaṣṭhī-tatpuruṣa (ambara+prakāśa)

• ambara – sky, atmosphere
  noun (neuter)
• prakāśa – light, splendor, brilliance
  noun (masculine)

Note: Modifies 'nidhim'.

ते (te) - they both (the observers) (those two (nominative dual))

(pronoun)

Nominative, masculine, dual of tad

tad - that, he, she, it

Note: Subject of 'dadṛśatuḥ'.

अगाधम् (agādham) - unfathomable (unfathomable, very deep)

(adjective)

Accusative, masculine, singular of agādha

agādha - unfathomable, very deep, bottomless

Compound type : nañ-tatpuruṣa (a+gādha)

• a – not, un-
  indeclinable
• gādha – fathomable, shallow
  adjective (masculine/feminine/neuter)

Note: Modifies 'nidhim'.

निधिम् (nidhim) - vast reservoir (of waters), ocean (treasure, reservoir, receptacle)

(noun)

Accusative, masculine, singular of nidhi

nidhi - treasure, store, receptacle, reservoir

action noun

Derived from root dhā (to place) with prefix ni.

Prefix: ni

Root: dhā (class 3)

Note: Direct object of 'dadṛśatuḥ'.

उरुम् (urum) - great (great, vast, wide)

(adjective)

Accusative, masculine, singular of uru

uru - great, vast, wide, extensive

Note: Modifies 'nidhim'.

अम्भसाम् (ambhasām) - of waters

(noun)

Genitive, neuter, plural of ambhas

ambhas - water, fluid

Note: Modifies 'nidhim'.

अनन्तम् (anantam) - boundless (endless, infinite, boundless)

(adjective)

Accusative, masculine, singular of ananta

ananta - endless, infinite, boundless (also name of Shesha-naga, or Vishnu)

Compound type : nañ-tatpuruṣa (an+anta)

• an – not, un-
  indeclinable
• anta – end, limit
  noun (masculine)

Note: Modifies 'nidhim'.