वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-5, chapter-46, verse-18

स तस्य रथनिर्घोषं ज्यास्वनं कार्मुकस्य च ।
निशम्य हरिवीरो ऽसौ संप्रहृष्टतरो ऽभवत् ॥१८॥

18. sa tasya rathanirghoṣaṃ jyāsvanaṃ kārmukasya ca ,
niśamya harivīro'sau saṃprahṛṣṭataro'bhavat.

18. saḥ tasya rathanirghoṣam jyāsvanam kārmukasya ca
niśamya harivīraḥ asau samprahṛṣṭataraḥ abhavat

18. saḥ asau harivīraḥ tasya rathanirghoṣam kārmukasya
jyāsvanam ca niśamya samprahṛṣṭataraḥ abhavat

18. That hero among the monkeys, upon hearing the thunderous roar of his (Indrajit's) chariot and the twang of his bowstring, became exceedingly delighted.

Words meanings summery:

• सः (saḥ) - he (referring to Hanuman) (he, that)

• तस्य (tasya) - of him (referring to Indrajit) (of him, his)

• रथनिर्घोषम् (rathanirghoṣam) - roar of the chariot, sound of the chariot

• ज्यास्वनम् (jyāsvanam) - twang of the bowstring

• कार्मुकस्य (kārmukasya) - of the bow

• च (ca) - and, also

• निशम्य (niśamya) - having heard, perceiving, upon hearing

• हरिवीरः (harivīraḥ) - Hanuman, the hero among the monkeys (hero of the monkeys, monkey-hero)

• असौ (asau) - that one (referring to Hanuman) (that one, he)

• सम्प्रहृष्टतरः (samprahṛṣṭataraḥ) - exceedingly delighted, very joyful

• अभवत् (abhavat) - became, was

Words meanings and morphology

सः (saḥ) - he (referring to Hanuman) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

तस्य (tasya) - of him (referring to Indrajit) (of him, his)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

रथनिर्घोषम् (rathanirghoṣam) - roar of the chariot, sound of the chariot

(noun)

Accusative, masculine, singular of rathanirghoṣa

rathanirghoṣa - roar/sound of a chariot

Compound type : ṣaṣṭhī tatpuruṣa (ratha+nirghoṣa)

• ratha – chariot
  noun (masculine)
• nirghoṣa – roar, loud sound, thunder
  noun (masculine)

ज्यास्वनम् (jyāsvanam) - twang of the bowstring

(noun)

Accusative, neuter, singular of jyāsvana

jyāsvana - sound/twang of a bowstring

Compound type : ṣaṣṭhī tatpuruṣa (jyā+svana)

• jyā – bowstring, mother earth
  noun (feminine)
• svana – sound, noise, roar
  noun (masculine)

कार्मुकस्य (kārmukasya) - of the bow

(noun)

Genitive, neuter, singular of kārmuka

kārmuka - bow, made of kārmuka wood

च (ca) - and, also

(indeclinable)

निशम्य (niśamya) - having heard, perceiving, upon hearing

(indeclinable)

absolutive (gerund)

Derived from root śam (to hear, perceive) with prefix ni, forming an absolutive with -ya suffix.

Prefix: ni

Root: śam (class 1)

हरिवीरः (harivīraḥ) - Hanuman, the hero among the monkeys (hero of the monkeys, monkey-hero)

(noun)

Nominative, masculine, singular of harivīra

harivīra - hero among monkeys, monkey-hero

Compound type : ṣaṣṭhī tatpuruṣa (hari+vīra)

• hari – monkey, tawny, Vishnu
  noun (masculine)
• vīra – hero, brave, warrior
  noun (masculine)

असौ (asau) - that one (referring to Hanuman) (that one, he)

(pronoun)

Nominative, masculine, singular of adas

adas - that, this, he, she, it (referring to something distant or particular)

सम्प्रहृष्टतरः (samprahṛṣṭataraḥ) - exceedingly delighted, very joyful

(adjective)

Nominative, masculine, singular of samprahṛṣṭatara

samprahṛṣṭatara - more or exceedingly delighted/joyful

Comparative suffix -tara added to samprahṛṣṭa (which is from root hṛṣ with prefixes sam and pra)

Compound type : tatpuruṣa (samprahṛṣṭa+tara)

• samprahṛṣṭa – greatly delighted, very joyful
  adjective (masculine)
  Past Passive Participle
  Derived from root hṛṣ (to rejoice) with prefixes sam and pra.
  Prefixes: sam+pra
  Root: hṛṣ (class 4)
• tara – more, further, comparative suffix
  suffix
  Comparative suffix, used here to intensify 'delighted' to 'exceedingly delighted'.

अभवत् (abhavat) - became, was

(verb)

3rd person , singular, active, past imperfect (laṅ) of abhavat

Imperfect tense (Laṅ) form of root bhū

Root: bhū (class 1)