महाभारतः mahābhārataḥ - book-3, chapter-99, verse-2

कालकेयैर्महाकायैः समन्तादभिरक्षितम् ।
समुद्यतप्रहरणैः सशृङ्गैरिव पर्वतैः ॥२॥

2. kālakeyairmahākāyaiḥ samantādabhirakṣitam ,
samudyatapraharaṇaiḥ saśṛṅgairiva parvataiḥ.

2. kālakeyaiḥ mahākāyaiḥ samantāt abhirakṣitam
samudyatapraharaṇaiḥ saśṛṅgaiḥ iva parvataiḥ

2. He (Vṛtra) was guarded all around by the monstrous-bodied Kālakeyās, who were like horned mountains, poised with uplifted weapons.

Words meanings summery:

• कालकेयैः (kālakeyaiḥ) - by the Kālakeyās (a class of demons)

• महाकायैः (mahākāyaiḥ) - by the monstrous-bodied Kālakeyās (by those with great bodies, by the monstrous-bodied)

• समन्तात् (samantāt) - all around, on all sides, everywhere

• अभिरक्षितम् (abhirakṣitam) - Vṛtra, who was protected (protected, guarded, defended)

• समुद्यतप्रहरणैः (samudyatapraharaṇaiḥ) - by the Kālakeyās with uplifted weapons (by those with uplifted weapons, by those whose weapons are raised)

• सशृङ्गैः (saśṛṅgaiḥ) - like mountains with peaks (with horns/peaks, horned, peaked)

• इव (iva) - like, as if, as

• पर्वतैः (parvataiḥ) - by mountains

Words meanings and morphology

कालकेयैः (kālakeyaiḥ) - by the Kālakeyās (a class of demons)

(proper noun)

Instrumental, masculine, plural of kālakeya

kālakeya - a class of powerful demons, descendants of Kāla and Danu

महाकायैः (mahākāyaiḥ) - by the monstrous-bodied Kālakeyās (by those with great bodies, by the monstrous-bodied)

(adjective)

Instrumental, masculine, plural of mahākāya

mahākāya - great-bodied, colossal, huge

Compound type : bahuvrīhi (mahā+kāya)

• mahat – great, large, mighty
  adjective (neuter)
• kāya – body, form, mass
  noun (masculine)

समन्तात् (samantāt) - all around, on all sides, everywhere

(indeclinable)

अभिरक्षितम् (abhirakṣitam) - Vṛtra, who was protected (protected, guarded, defended)

(adjective)

Accusative, masculine, singular of abhirakṣita

abhirakṣita - protected, guarded, defended

Past Passive Participle

Prefix: abhi

Root: rakṣ (class 1)

Note: Agrees with 'Vṛtram' from the previous verse.

समुद्यतप्रहरणैः (samudyatapraharaṇaiḥ) - by the Kālakeyās with uplifted weapons (by those with uplifted weapons, by those whose weapons are raised)

(adjective)

Instrumental, masculine, plural of samudyatapraharaṇa

samudyatapraharaṇa - having uplifted weapons, with weapons raised

Compound type : bahuvrīhi (samudyata+praharaṇa)

• samudyata – uplifted, raised, prepared
  adjective (masculine)
  Past Passive Participle
  Prefixes: sam+ud
  Root: yam (class 1)
• praharaṇa – weapon, missile, striking
  noun (neuter)
  Prefix: pra
  Root: hṛ (class 1)

सशृङ्गैः (saśṛṅgaiḥ) - like mountains with peaks (with horns/peaks, horned, peaked)

(adjective)

Instrumental, masculine, plural of saśṛṅga

saśṛṅga - having horns, horned; having peaks, peaked

Compound type : bahuvrīhi (sa+śṛṅga)

• sa – with, accompanied by
  indeclinable
• śṛṅga – horn, peak, summit, pinnacle
  noun (neuter)

इव (iva) - like, as if, as

(indeclinable)

पर्वतैः (parvataiḥ) - by mountains

(noun)

Instrumental, masculine, plural of parvata

parvata - mountain, hill, rock