महाभारतः mahābhārataḥ - book-8, chapter-27, verse-43

महाघोषं महामेघं दर्दुरः प्रतिनर्दसि ।
कामतोयप्रदं लोके नरपर्जन्यमर्जुनम् ॥४३॥

43. mahāghoṣaṁ mahāmeghaṁ darduraḥ pratinardasi ,
kāmatoyapradaṁ loke naraparjanyamarjunam.

43. mahāghoṣam mahāmegham darduraḥ pratinardasi
kāmatoyapradam loke naraparjanyam arjunam

43. darduraḥ mahāghoṣam mahāmegham kāmatoyapradam loke
pratinardasi [tvam] arjunam naraparjanyam [pratinardasi]

43. Just as a frog croaks in imitation of a great, thundering cloud, which provides desired water to the world, so do you croak in defiance of Arjuna, who is a man like a rain-cloud.

Words meanings summery:

• महाघोषम् (mahāghoṣam) - very loud (like a cloud) (of great sound, very loud, thundering)

• महामेघम् (mahāmegham) - a large, thundering cloud (great cloud)

• दर्दुरः (darduraḥ) - frog

• प्रतिनर्दसि (pratinardasi) - you croak in imitation/defiance (like a frog) (you roar in response, you imitate with a roar, you challenge with a roar)

• कामतोयप्रदम् (kāmatoyapradam) - provider of desired rain (like a cloud) (giver of desired water)

• लोके (loke) - in the world, in the universe, among people

• नरपर्जन्यम् (naraparjanyam) - Arjuna, compared to a rain-cloud among men for his generosity or power (man-raincloud, a man like a rain-cloud)

• अर्जुनम् (arjunam) - Arjuna

Words meanings and morphology

महाघोषम् (mahāghoṣam) - very loud (like a cloud) (of great sound, very loud, thundering)

(adjective)

Accusative, masculine, singular of mahāghoṣa

mahāghoṣa - great sound, loud noise, great roar

Compound type : karmadhāraya (mahā+ghoṣa)

• mahā – great, large, mighty
  adjective
• ghoṣa – sound, noise, roar, cry
  noun (masculine)
  Root: ghuṣ (class 1)

महामेघम् (mahāmegham) - a large, thundering cloud (great cloud)

(noun)

Accusative, masculine, singular of mahāmegha

mahāmegha - great cloud

Compound type : karmadhāraya (mahā+megha)

• mahā – great, large, mighty
  adjective
• megha – cloud, rain-cloud
  noun (masculine)
  Root: mih (class 1)

दर्दुरः (darduraḥ) - frog

(noun)

Nominative, masculine, singular of dardura

dardura - frog

प्रतिनर्दसि (pratinardasi) - you croak in imitation/defiance (like a frog) (you roar in response, you imitate with a roar, you challenge with a roar)

(verb)

2nd person , singular, active, present (lat) of pratinard

Prefix: prati

Root: nard (class 1)

कामतोयप्रदम् (kāmatoyapradam) - provider of desired rain (like a cloud) (giver of desired water)

(adjective)

Accusative, masculine, singular of kāmatoyaprada

kāmatoyaprada - giver of desired water

Compound type : upapada-tatpuruṣa (kāma-toya+prada)

• kāma – desire, wish, love
  noun (masculine)
  Root: kam (class 1)
• toya – water
  noun (neuter)
  Root: tu
• prada – giving, bestowing, giver
  adjective
  agent noun
  From pra-dA + a
  Prefix: pra
  Root: dā (class 3)

लोके (loke) - in the world, in the universe, among people

(noun)

Locative, masculine, singular of loka

loka - world, realm, people

Root: lok (class 1)

नरपर्जन्यम् (naraparjanyam) - Arjuna, compared to a rain-cloud among men for his generosity or power (man-raincloud, a man like a rain-cloud)

(noun)

Accusative, masculine, singular of naraparjanya

naraparjanya - a man who is a rain-cloud, a rain-cloud among men

Compound type : karmadhāraya (nara+parjanya)

• nara – man, human being
  noun (masculine)
• parjanya – rain-cloud, god of rain
  noun (masculine)

अर्जुनम् (arjunam) - Arjuna

(proper noun)

Accusative, masculine, singular of arjuna

arjuna - Arjuna (name of a Pandava prince)