महाभारतः mahābhārataḥ - book-6, chapter-107, verse-48

द्रोणस्य रथनिर्घोषं पर्जन्यनिनदोपमम् ।
श्रुत्वा प्रभद्रका राजन्समकम्पन्त मारिष ॥४८॥

48. droṇasya rathanirghoṣaṁ parjanyaninadopamam ,
śrutvā prabhadrakā rājansamakampanta māriṣa.

48. droṇasya rathanirghoṣaṃ parjanyaninadopamam
śrutvā prabhadrakāḥ rājan samakampanta māriṣa

48. rājan māriṣa,
(prabhadrakāḥ) droṇasya (parjanyaninadopamam) rathanirghoṣaṃ śrutvā samakampanta.

48. O king, O venerable one, upon hearing the roar of Droṇa's chariot, which was like the thunder of a cloud, the Prabhadrakas trembled.

Words meanings summery:

• द्रोणस्य (droṇasya) - of Droṇa

• रथनिर्घोषं (rathanirghoṣaṁ) - the roar of the chariot

• पर्जन्यनिनदोपमम् (parjanyaninadopamam) - like the thunder of a cloud

• श्रुत्वा (śrutvā) - having heard, upon hearing

• प्रभद्रकाः (prabhadrakāḥ) - A specific warrior tribe mentioned in the Mahābhārata (the Prabhadrakas)

• राजन् (rājan) - Addressing Dhṛtarāṣṭra (O king)

• समकम्पन्त (samakampanta) - they trembled

• मारिष (māriṣa) - Addressing Dhṛtarāṣṭra (O venerable one, O respected sir)

Words meanings and morphology

द्रोणस्य (droṇasya) - of Droṇa

(proper noun)

Genitive, masculine, singular of droṇa

droṇa - Droṇa (a teacher of martial arts, Kuru general)

रथनिर्घोषं (rathanirghoṣaṁ) - the roar of the chariot

(noun)

Accusative, masculine, singular of rathanirghoṣa

rathanirghoṣa - sound or roar of a chariot

Compound type : ṣaṣṭhī-tatpuruṣa (ratha+nirghoṣa)

• ratha – chariot
  noun (masculine)
• nirghoṣa – roar, sound, noise
  noun (masculine)
  Prefix: nir
  Root: ghuṣ (class 1)

पर्जन्यनिनदोपमम् (parjanyaninadopamam) - like the thunder of a cloud

(adjective)

Accusative, masculine, singular of parjanyaninadopama

parjanyaninadopama - resembling the roar of a thundercloud

Compound type : tatpuruṣa-karmadhāraya (parjanya+ninada+upama)

• parjanya – rain-cloud, thundercloud
  noun (masculine)
• ninada – roar, sound, thunder
  noun (masculine)
  Prefix: ni
  Root: nad (class 1)
• upama – similar, resembling, like
  adjective (masculine)

श्रुत्वा (śrutvā) - having heard, upon hearing

(indeclinable)

Absolutive / Gerund

Formed with -tvā suffix

Root: śru (class 5)

प्रभद्रकाः (prabhadrakāḥ) - A specific warrior tribe mentioned in the Mahābhārata (the Prabhadrakas)

(proper noun)

Nominative, masculine, plural of prabhadraka

prabhadraka - a particular tribe or people; excellent, auspicious

राजन् (rājan) - Addressing Dhṛtarāṣṭra (O king)

(noun)

Vocative, masculine, singular of rājan

rājan - king, ruler

समकम्पन्त (samakampanta) - they trembled

(verb)

3rd person , plural, active, imperfect (laṅ) of kamp

Imperfect tense, 3rd person plural

Root kamp (1st class), with prefix sam

Prefix: sam

Root: kamp (class 1)

मारिष (māriṣa) - Addressing Dhṛtarāṣṭra (O venerable one, O respected sir)

(noun)

Vocative, masculine, singular of māriṣa

māriṣa - a respectful address, 'sir', 'venerable one'