वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-28, verse-4

इयं सा लक्ष्यते लङ्का पुरी रावणपालिता ।
सासुरोरगगन्धर्वैरमरैरपि दुर्जया ॥४॥

4. iyaṃ sā lakṣyate laṅkā purī rāvaṇapālitā ,
sāsuroragagandharvairamarairapi durjayā.

4. iyam sā lakṣyate laṅkā purī rāvaṇapālitā
sa-asuroragagandharvaiḥ amaraiḥ api durjayā

4. iyam sā rāvaṇapālitā laṅkā purī lakṣyate (sā)
asuroragagandharvaiḥ amaraiḥ api durjayā (asti)

4. This is that visible city of Laṅkā, ruled by Rāvaṇa. It is difficult to conquer even by demons (asuras), serpentine beings (uragas), celestial musicians (gandharvas), and the immortals.

Words meanings summery:

• इयम् (iyam) - this (feminine)

• सा (sā) - that (feminine)

• लक्ष्यते (lakṣyate) - is seen, is observed, is visible

• लङ्का (laṅkā) - Laṅkā, the capital of Rāvaṇa (Laṅkā)

• पुरी (purī) - city, town

• रावणपालिता (rāvaṇapālitā) - ruled/protected by Rāvaṇa

• स-असुरोरगगन्धर्वैः (sa-asuroragagandharvaiḥ) - by demons (asuras), serpentine beings (uragas), and celestial musicians (gandharvas) (by asuras, uragas, and gandharvas)

• अमरैः (amaraiḥ) - by immortals, by gods

• अपि (api) - even, also, too

• दुर्जया (durjayā) - difficult to conquer, unconquerable

Words meanings and morphology

इयम् (iyam) - this (feminine)

(pronoun)

Nominative, feminine, singular of idam

idam - this

सा (sā) - that (feminine)

(pronoun)

Nominative, feminine, singular of tad

tad - that

लक्ष्यते (lakṣyate) - is seen, is observed, is visible

(verb)

3rd person , singular, passive, present (laṭ) of lakṣ

Passive voice of root lakṣ

Present, 3rd person, singular, passive

Root: lakṣ (class 1)

लङ्का (laṅkā) - Laṅkā, the capital of Rāvaṇa (Laṅkā)

(proper noun)

Nominative, feminine, singular of laṅkā

laṅkā - Laṅkā (name of the city of Rāvaṇa)

पुरी (purī) - city, town

(noun)

Nominative, feminine, singular of purī

purī - city, town

रावणपालिता (rāvaṇapālitā) - ruled/protected by Rāvaṇa

(adjective)

Nominative, feminine, singular of rāvaṇapālita

rāvaṇapālita - ruled by Rāvaṇa

from Rāvaṇa + pālita

Compound type : tatpuruṣa (rāvaṇa+pālita)

• rāvaṇa – Rāvaṇa (name of the demon king)
  proper noun (masculine)
• pālita – protected, ruled
  adjective (feminine)
  Past Passive Participle
  from root pāl (to protect, rule)
  Root: pāl (class 10)

स-असुरोरगगन्धर्वैः (sa-asuroragagandharvaiḥ) - by demons (asuras), serpentine beings (uragas), and celestial musicians (gandharvas) (by asuras, uragas, and gandharvas)

(adjective)

Instrumental, masculine, plural of sa-asuroragagandharva

sa-asuroragagandharva - together with asuras, uragas, and gandharvas

Compound type : bahuvrīhi (sa+asura+uraga+gandharva)

• sa – with, together
  indeclinable
  prefix for bahuvrīhi
• asura – demon, titan
  noun (masculine)
  Root: asu
• uraga – serpent, snake
  noun (masculine)
  literally 'chest-goer'
• gandharva – celestial musician
  noun (masculine)

अमरैः (amaraiḥ) - by immortals, by gods

(noun)

Instrumental, masculine, plural of amara

amara - immortal, god

from a (not) + mara (dying)

Prefix: a

Root: mṛ

अपि (api) - even, also, too

(indeclinable)

दुर्जया (durjayā) - difficult to conquer, unconquerable

(adjective)

Nominative, feminine, singular of durjaya

durjaya - difficult to conquer, unconquerable

Gerundive/Karmaṇi Kṛt

from dur (difficult) + ji (to conquer)

Prefix: dur

Root: ji (class 1)