महाभारतः mahābhārataḥ - book-3, chapter-154, verse-53

उग्राभिरुग्ररूपाभिर्बृहतीभिः परस्परम् ।
वज्रैरिव महावेगैराजघ्नतुरमर्षणौ ॥५३॥

53. ugrābhirugrarūpābhirbṛhatībhiḥ parasparam ,
vajrairiva mahāvegairājaghnaturamarṣaṇau.

53. ugrābhiḥ ugrarūpābhiḥ bṛhatībhiḥ parasparam
vajraiḥ iva mahāvegaiḥ ājaghṇatuḥ amarṣaṇau

53. Those two intolerant ones struck each other with fierce, terrifying, and massive [rocks], just as if they were wielding mighty, swift thunderbolts.

Words meanings summery:

• उग्राभिः (ugrābhiḥ) - by fierce (rocks) (by fierce, by terrible ones)

• उग्ररूपाभिः (ugrarūpābhiḥ) - by terrible-looking (rocks) (by those of fierce forms, by terrible-looking ones)

• बृहतीभिः (bṛhatībhiḥ) - by large (rocks) (by large ones, by mighty ones)

• परस्परम् (parasparam) - each other, mutually

• वज्रैः (vajraiḥ) - by thunderbolts

• इव (iva) - like, as if

• महावेगैः (mahāvegaiḥ) - by mighty, swift (thunderbolts) (by greatly forceful, by swift)

• आजघ्णतुः (ājaghṇatuḥ) - they struck, they hit

• अमर्षणौ (amarṣaṇau) - two intolerant ones, two impatient ones, two unforgiving ones

Words meanings and morphology

उग्राभिः (ugrābhiḥ) - by fierce (rocks) (by fierce, by terrible ones)

(adjective)

Instrumental, feminine, plural of ugrā

ugra - fierce, terrible, mighty, violent

उग्ररूपाभिः (ugrarūpābhiḥ) - by terrible-looking (rocks) (by those of fierce forms, by terrible-looking ones)

(adjective)

Instrumental, feminine, plural of ugrarūpā

ugrarūpa - of fierce form, terrible in appearance

Compound type : karmadhāraya (ugra+rūpa)

• ugra – fierce, terrible, mighty
  adjective (masculine)
• rūpa – form, shape, appearance
  noun (neuter)

बृहतीभिः (bṛhatībhiḥ) - by large (rocks) (by large ones, by mighty ones)

(adjective)

Instrumental, feminine, plural of bṛhatī

bṛhat - large, great, vast, mighty

परस्परम् (parasparam) - each other, mutually

(indeclinable)

वज्रैः (vajraiḥ) - by thunderbolts

(noun)

Instrumental, masculine, plural of vajra

vajra - thunderbolt, diamond

Note: Used in comparison to the rocks being used as weapons.

इव (iva) - like, as if

(indeclinable)

महावेगैः (mahāvegaiḥ) - by mighty, swift (thunderbolts) (by greatly forceful, by swift)

(adjective)

Instrumental, masculine, plural of mahāvega

mahāvega - of great speed, very swift, very forceful

Compound type : karmadhāraya (mahā+vega)

• mahā – great, large, mighty
  indeclinable
• vega – speed, force, velocity, impetus
  noun (masculine)
  From root 'vij' (to move rapidly).
  Root: vij (class 6)

आजघ्णतुः (ājaghṇatuḥ) - they struck, they hit

(verb)

3rd person , dual, active, perfect (Lit) of āhan

Perfect (Lit)

Reduplicated perfect form from verb root 'han' (to strike, kill) with prefix 'ā', 3rd person dual, active voice.

Prefix: ā

Root: han (class 2)

अमर्षणौ (amarṣaṇau) - two intolerant ones, two impatient ones, two unforgiving ones

(adjective)

Nominative, masculine, dual of amarṣaṇa

amarṣaṇa - intolerant, impatient, unforgiving, wrathful

Derived from 'a' (negative prefix) + 'marṣaṇa' (enduring, patient), from root 'mṛṣ' (to endure).

Compound type : nañ-tatpuruṣa (a+marṣaṇa)

• a – not, un-, non-
  indeclinable
  Negative prefix.
• marṣaṇa – enduring, tolerating, patient
  adjective (masculine)
  Verbal noun/adjective derived from root
  From root 'mṛṣ' (to endure, bear).
  Root: mṛṣ (class 4)