वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-18, verse-38

सुदीर्घाञ्चितलाङ्गूला मत्तमातंगसंनिभाः ।
महापर्वतसंकाशा महाजीमूतनिस्वनाः ॥३८॥

38. sudīrghāñcitalāṅgūlā mattamātaṃgasaṃnibhāḥ ,
mahāparvatasaṃkāśā mahājīmūtanisvanāḥ.

38. su-dīrgha-añcita-lāṅgūlāḥ matta-mātaṅga-saṃnibhāḥ
mahā-parvata-saṃkāśāḥ mahā-jīmūta-nisvanāḥ

38. su-dīrgha-añcita-lāṅgūlāḥ matta-mātaṅga-saṃnibhāḥ
mahā-parvata-saṃkāśāḥ mahā-jīmūta-nisvanāḥ

38. They have very long, arched tails; they resemble enraged elephants. They appear like great mountains and possess the roar of mighty thunderclouds.

Words meanings summery:

• सु-दीर्घ-अञ्चित-लाङ्गूलाः (su-dīrgha-añcita-lāṅgūlāḥ) - having very long, arched tails

• मत्त-मातङ्ग-संनिभाः (matta-mātaṅga-saṁnibhāḥ) - resembling enraged elephants

• महा-पर्वत-संकाशाः (mahā-parvata-saṁkāśāḥ) - appearing like great mountains

• महा-जीमूत-निस्वनाः (mahā-jīmūta-nisvanāḥ) - having the roar of great clouds

Words meanings and morphology

सु-दीर्घ-अञ्चित-लाङ्गूलाः (su-dīrgha-añcita-lāṅgūlāḥ) - having very long, arched tails

(adjective)

Nominative, masculine, plural of su-dīrgha-añcita-lāṅgūla

su-dīrgha-añcita-lāṅgūla - having very long and curved/arched tails

Compound type : bahuvrihi (su+dīrgha+añcita+lāṅgūla)

• su – good, well, very, excellent
  indeclinable
• dīrgha – long
  adjective (masculine)
• añcita – curved, bent, adorned
  adjective (neuter)
  Past Passive Participle
  root 'añc' + kta
  Root: añc (class 1)
• lāṅgūla – tail
  noun (neuter)

Note: 'su-dīrgha' and 'añcita' qualify 'lāṅgūla'

मत्त-मातङ्ग-संनिभाः (matta-mātaṅga-saṁnibhāḥ) - resembling enraged elephants

(adjective)

Nominative, masculine, plural of matta-mātaṅga-saṃnibha

matta-mātaṅga-saṁnibha - resembling infuriated elephants

Compound type : tatpurusha (matta+mātaṅga+saṃnibha)

• matta – intoxicated, enraged, furious
  adjective (masculine)
  Past Passive Participle
  root 'mad' + kta
  Root: mad (class 4)
• mātaṅga – elephant
  noun (masculine)
• saṃnibha – similar, resembling, like
  adjective (masculine)
  Prefix: sam

महा-पर्वत-संकाशाः (mahā-parvata-saṁkāśāḥ) - appearing like great mountains

(adjective)

Nominative, masculine, plural of mahā-parvata-saṃkāśa

mahā-parvata-saṁkāśa - resembling great mountains

Compound type : tatpurusha (mahā+parvata+saṃkāśa)

• mahā – great, large, mighty
  adjective (masculine)
• parvata – mountain, hill
  noun (masculine)
• saṃkāśa – like, resembling, appearing as
  adjective (masculine)
  Prefix: sam

महा-जीमूत-निस्वनाः (mahā-jīmūta-nisvanāḥ) - having the roar of great clouds

(adjective)

Nominative, masculine, plural of mahā-jīmūta-nisvana

mahā-jīmūta-nisvana - having the sound or roar of great clouds/thunderclouds

Compound type : bahuvrihi (mahā+jīmūta+nisvana)

• mahā – great, large, mighty
  adjective (masculine)
• jīmūta – cloud, thundercloud
  noun (masculine)
• nisvana – sound, noise, roar
  noun (masculine)
  Prefix: ni