महाभारतः mahābhārataḥ - book-3, chapter-258, verse-16

ईशानेन तथा सख्यं पुत्रं च नलकूबरम् ।
राजधानीनिवेशं च लङ्कां रक्षोगणान्विताम् ॥१६॥

16. īśānena tathā sakhyaṁ putraṁ ca nalakūbaram ,
rājadhānīniveśaṁ ca laṅkāṁ rakṣogaṇānvitām.

16. īśānena tathā sakhyam putram ca nalakūbaram
rājadhānīniveśam ca laṅkām rakṣogaṇānvitām

16. And friendship with Īśāna, and his son Nalakūbara, and the establishment of the capital city Laṅkā, which was inhabited by hosts of Rākṣasas.

Words meanings summery:

• ईशानेन (īśānena) - by Īśāna, with Īśāna

• तथा (tathā) - and (thus, so, in that manner, also, and)

• सख्यम् (sakhyam) - friendship, alliance

• पुत्रम् (putram) - son, child

• च (ca) - and (and, also)

• नलकूबरम् (nalakūbaram) - Nalakūbara (son of Kubera) (Nalakūbara (a mythological figure))

• राजधानीनिवेशम् (rājadhānīniveśam) - the establishment of a capital city, settlement of a capital

• च (ca) - and (and, also)

• लङ्काम् (laṅkām) - Laṅkā (the capital city) (Laṅkā (name of a city))

• रक्षोगणान्विताम् (rakṣogaṇānvitām) - referring to Laṅkā, which was inhabited by hosts of Rākṣasas (accompanied by hosts of Rākṣasas, inhabited by hordes of demons)

Words meanings and morphology

ईशानेन (īśānena) - by Īśāna, with Īśāna

(proper noun)

Instrumental, masculine, singular of īśāna

īśāna - Lord, ruler, controller; a name of Śiva

Root: īś (class 2)

तथा (tathā) - and (thus, so, in that manner, also, and)

(indeclinable)

सख्यम् (sakhyam) - friendship, alliance

(noun)

Accusative, neuter, singular of sakhya

sakhya - friendship, alliance, companionship

from sakhi (friend)

Note: Could also be nominative, but likely accusative as part of a list of objects.

पुत्रम् (putram) - son, child

(noun)

Accusative, masculine, singular of putra

putra - son, child

च (ca) - and (and, also)

(indeclinable)

नलकूबरम् (nalakūbaram) - Nalakūbara (son of Kubera) (Nalakūbara (a mythological figure))

(proper noun)

Accusative, masculine, singular of nalakūbara

nalakūbara - Nalakūbara (name of Kubera's son)

राजधानीनिवेशम् (rājadhānīniveśam) - the establishment of a capital city, settlement of a capital

(noun)

Accusative, masculine, singular of rājadhānīniveśa

rājadhānīniveśa - establishment of a capital, settlement of a capital city

Compound type : tatpuruṣa (rājadhānī+niveśa)

• rājadhānī – royal capital, capital city
  noun (feminine)
• niveśa – entering, settlement, establishment, arrangement
  noun (masculine)
  from ni-viś
  Prefix: ni
  Root: viś (class 6)

च (ca) - and (and, also)

(indeclinable)

लङ्काम् (laṅkām) - Laṅkā (the capital city) (Laṅkā (name of a city))

(proper noun)

Accusative, feminine, singular of laṅkā

laṅkā - Laṅkā (the name of the capital of Rāvaṇa)

रक्षोगणान्विताम् (rakṣogaṇānvitām) - referring to Laṅkā, which was inhabited by hosts of Rākṣasas (accompanied by hosts of Rākṣasas, inhabited by hordes of demons)

(adjective)

Accusative, feminine, singular of rakṣogaṇānvita

rakṣogaṇānvita - accompanied by or full of hordes of Rākṣasas

Compound type : tatpuruṣa (rakṣas+gaṇa+anvita)

• rakṣas – a Rākṣasa, demon
  noun (masculine)
• gaṇa – a host, troop, collection, multitude
  noun (masculine)
• anvita – accompanied by, connected with, joined with, possessed of
  adjective
  Past Passive Participle
  from anu-i (to go after) + kta
  Prefix: anu
  Root: i (class 2)

Note: Qualifies Laṅkām.