वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-58, verse-18

समुत्पतन्तं त्रिशिरास्त्रिभिराशीविषोपमैः ।
घोरैर्हरिपतेः पुत्रं ललाटे ऽभिजघान ह ॥१८॥

18. samutpatantaṃ triśirāstribhirāśīviṣopamaiḥ ,
ghorairharipateḥ putraṃ lalāṭe'bhijaghāna ha.

18. samutpatantam triśirāḥ tribhiḥ āśīviṣopamaiḥ
ghoraiḥ haripateḥ putram lalāṭe abhijaghāna ha

18. As the son of the lord of monkeys was springing up, Trishiras struck him on the forehead with three terrible (arrows) like venomous snakes.

Words meanings summery:

• समुत्पतन्तम् (samutpatantam) - while springing up, rising up

• त्रिशिराः (triśirāḥ) - Trishiras (name of a Rākṣasa) (having three heads)

• त्रिभिः (tribhiḥ) - with three

• आशीविषोपमैः (āśīviṣopamaiḥ) - resembling venomous snakes, like serpents with venom in their fangs

• घोरैः (ghoraiḥ) - dreadful, terrible, fearful

• हरिपतेः (haripateḥ) - of the lord of monkeys

• पुत्रम् (putram) - son

• ललाटे (lalāṭe) - on the forehead

• अभिजघान (abhijaghāna) - struck, hit, assailed

• ह (ha) - indeed, surely (emphasizing particle)

Words meanings and morphology

समुत्पतन्तम् (samutpatantam) - while springing up, rising up

(adjective)

Accusative, masculine, singular of samutpatat

samutpatat - springing up, rising up

Present Active Participle

Derived from root pat with prefixes sam- and ut-

Prefixes: sam+ut

Root: pat (class 1)

त्रिशिराः (triśirāḥ) - Trishiras (name of a Rākṣasa) (having three heads)

(proper noun)

Nominative, masculine, singular of triśiras

triśiras - having three heads

Compound type : bahuvrīhi (tri+śiras)

• tri – three
  numeral
• śiras – head
  noun (neuter)

त्रिभिः (tribhiḥ) - with three

(numeral)

आशीविषोपमैः (āśīviṣopamaiḥ) - resembling venomous snakes, like serpents with venom in their fangs

(adjective)

Instrumental, masculine, plural of āśīviṣopama

āśīviṣopama - resembling venomous snakes

Compound type : tatpuruṣa (āśīviṣa+upama)

• āśīviṣa – venomous snake, fanged serpent
  noun (masculine)
• upama – likeness, comparison, similar to
  adjective (masculine)

घोरैः (ghoraiḥ) - dreadful, terrible, fearful

(adjective)

Instrumental, masculine, plural of ghora

ghora - dreadful, terrible, fearful

हरिपतेः (haripateḥ) - of the lord of monkeys

(noun)

Genitive, masculine, singular of haripati

haripati - lord of monkeys

Compound type : tatpuruṣa (hari+pati)

• hari – monkey, lion, Vishnu
  noun (masculine)
• pati – lord, master
  noun (masculine)

पुत्रम् (putram) - son

(noun)

Accusative, masculine, singular of putra

putra - son

ललाटे (lalāṭe) - on the forehead

(noun)

Locative, neuter, singular of lalāṭa

lalāṭa - forehead

अभिजघान (abhijaghāna) - struck, hit, assailed

(verb)

3rd person , singular, active, perfect (lit) of abhihan

Prefix: abhi

Root: han (class 2)

ह (ha) - indeed, surely (emphasizing particle)

(indeclinable)