वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-18, verse-27

उशीर बीजमाश्रित्य पर्वतं मन्दरोपमम् ।
रमते वानरश्रेष्ठो दिवि शक्र इव स्वयम् ॥२७॥

27. uśīra bījamāśritya parvataṃ mandaropamam ,
ramate vānaraśreṣṭho divi śakra iva svayam.

27. uśīrabījam āśritya parvatam mandaropamam
ramate vānaraśreṣṭhaḥ divi śakraḥ iva svayam

27. vānaraśreṣṭhaḥ mandaropamam parvatam uśīrabījam
āśritya divi śakraḥ iva svayam ramate

27. Resting on the Uśīrabīja mountain, which resembles Mount Mandara, the chief of monkeys delights there, just like Indra (Śakra) himself in heaven.

Words meanings summery:

• उशीरबीजम् (uśīrabījam) - the mountain Uśīrabīja

• आश्रित्य (āśritya) - resting on (having resorted to, having taken shelter of, resting on)

• पर्वतम् (parvatam) - mountain

• मन्दरोपमम् (mandaropamam) - resembling Mandara, like Mandara

• रमते (ramate) - delights there (delights, rejoices, sports, revels)

• वानरश्रेष्ठः (vānaraśreṣṭhaḥ) - chief of monkeys, best of monkeys

• दिवि (divi) - in heaven, in the sky

• शक्रः (śakraḥ) - Indra (Indra, the powerful one)

• इव (iva) - just like (like, as, as if)

• स्वयम् (svayam) - himself, herself, itself, by oneself

Words meanings and morphology

उशीरबीजम् (uśīrabījam) - the mountain Uśīrabīja

(proper noun)

Accusative, neuter, singular of uśīrabīja

uśīrabīja - name of a mountain

आश्रित्य (āśritya) - resting on (having resorted to, having taken shelter of, resting on)

(indeclinable)

absolutive

Absolutive (gerund) from √śri (to resort to, lean on) with prefix ā

Prefix: ā

Root: śri (class 1)

पर्वतम् (parvatam) - mountain

(noun)

Accusative, masculine, singular of parvata

parvata - mountain, hill

मन्दरोपमम् (mandaropamam) - resembling Mandara, like Mandara

(adjective)

Accusative, masculine, singular of mandaropama

mandaropama - resembling Mandara, like Mandara

Compound type : tatpuruṣa (mandara+upama)

• mandara – Mandara (name of a mythical mountain, used by gods for churning the ocean)
  proper noun (masculine)
• upama – resemblance, comparison, like, equal to
  noun (masculine)

रमते (ramate) - delights there (delights, rejoices, sports, revels)

(verb)

3rd person , singular, middle, present (lat) of ram

Root: ram (class 1)

वानरश्रेष्ठः (vānaraśreṣṭhaḥ) - chief of monkeys, best of monkeys

(noun)

Nominative, masculine, singular of vānaraśreṣṭha

vānaraśreṣṭha - chief of monkeys, best of monkeys

Compound type : tatpuruṣa (vānara+śreṣṭha)

• vānara – monkey
  noun (masculine)
• śreṣṭha – best, chief, most excellent
  adjective (masculine)

दिवि (divi) - in heaven, in the sky

(noun)

Locative, feminine, singular of div

div - sky, heaven, day

शक्रः (śakraḥ) - Indra (Indra, the powerful one)

(proper noun)

Nominative, masculine, singular of śakra

śakra - Indra (the chief of the gods), powerful, mighty

इव (iva) - just like (like, as, as if)

(indeclinable)

स्वयम् (svayam) - himself, herself, itself, by oneself

(indeclinable)