वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-1, chapter-3, verse-25

प्रतारं च समुद्रस्य रात्रौ लङ्कावरोधनम् ।
विभीषणेन संसर्गं वधोपायनिवेदनम् ॥२५॥

25. pratāraṃ ca samudrasya rātrau laṅkāvarodhanam ,
vibhīṣaṇena saṃsargaṃ vadhopāyanivedanam.

25. pratāram ca samudrasya rātrau laṅkāvarodhanam
vibhīṣaṇena saṃsargam vadhopāyanivedanam

25. samudrasya pratāram ca rātrau laṅkāvarodhanam
vibhīṣaṇena saṃsargam vadhopāyanivedanam

25. And the crossing of the ocean, the siege of Lanka at night, the association with Vibhishana, and his disclosure of the means to slay (Ravana).

Words meanings summery:

• प्रतारम् (pratāram) - crossing over, passing over, traverse

• च (ca) - and, also, moreover

• समुद्रस्य (samudrasya) - of the ocean, sea

• रात्रौ (rātrau) - at night, in the night

• लङ्कावरोधनम् (laṅkāvarodhanam) - the siege of Lanka

• विभीषणेन (vibhīṣaṇena) - by Vibhishana

• संसर्गम् (saṁsargam) - association, contact, meeting

• वधोपायनिवेदनम् (vadhopāyanivedanam) - the revealing of the means of killing/slaying

Words meanings and morphology

प्रतारम् (pratāram) - crossing over, passing over, traverse

(noun)

Accusative, masculine, singular of pratāra

pratāra - crossing over, passage, ford

From pra + root tṛ (to cross)

Prefix: pra

Root: tṛ (class 1)

च (ca) - and, also, moreover

(indeclinable)

समुद्रस्य (samudrasya) - of the ocean, sea

(noun)

Genitive, masculine, singular of samudra

samudra - ocean, sea

From sam + ud + root dra (to run)

Prefixes: sam+ud

Root: dru (class 1)

रात्रौ (rātrau) - at night, in the night

(noun)

Locative, feminine, singular of rātri

rātri - night

लङ्कावरोधनम् (laṅkāvarodhanam) - the siege of Lanka

(noun)

Accusative, neuter, singular of laṅkāvarodhana

laṅkāvarodhana - the siege or obstruction of Lanka

Compound type : tatpurusha (laṅkā+avarodhana)

• laṅkā – Lanka (name of Ravana's city)
  proper noun (feminine)
• avarodhana – siege, obstruction, confinement
  noun (neuter)
  From ava + root rudh (to obstruct, besiege)
  Prefix: ava
  Root: rudh (class 7)

विभीषणेन (vibhīṣaṇena) - by Vibhishana

(proper noun)

Instrumental, masculine, singular of vibhīṣaṇa

vibhīṣaṇa - Vibhishana (name of Ravana's brother)

संसर्गम् (saṁsargam) - association, contact, meeting

(noun)

Accusative, masculine, singular of saṃsarga

saṁsarga - association, contact, meeting, union

From sam + root sṛj (to let go, create)

Prefix: sam

Root: sṛj (class 6)

वधोपायनिवेदनम् (vadhopāyanivedanam) - the revealing of the means of killing/slaying

(noun)

Accusative, neuter, singular of vadhopāyanivedana

vadhopāyanivedana - the disclosure of the means to slay

Compound type : tatpurusha (vadha+upāya+nivedana)

• vadha – killing, slaying, murder
  noun (masculine)
  From root han (to strike, kill)
  Root: han (class 2)
• upāya – means, method, resource
  noun (masculine)
  From upa + root i (to go)
  Prefix: upa
  Root: i (class 2)
• nivedana – informing, announcing, revealing, presentation
  noun (neuter)
  From ni + root vid (to know, find)
  Prefix: ni
  Root: vid (class 6)