महाभारतः mahābhārataḥ - book-1, chapter-164, verse-2

उवाच च महेष्वासो गन्धर्वं कुरुसत्तमः ।
जातकौतूहलोऽतीव वसिष्ठस्य तपोबलात् ॥२॥

2. uvāca ca maheṣvāso gandharvaṁ kurusattamaḥ ,
jātakautūhalo'tīva vasiṣṭhasya tapobalāt.

2. uvāca ca maheṣvāsaḥ gandharvam kurusattamaḥ
| jātakautūhalaḥ atīva vasiṣṭhasya tapasbalāt

2. And the great archer (maheṣvāsa), the best of the Kurus, spoke to the Gandharva, as extreme curiosity had arisen in him regarding the power of austerity (tapas) of Vasiṣṭha.

Words meanings summery:

• उवाच (uvāca) - said, spoke

• च (ca) - and, also

• महेष्वासः (maheṣvāsaḥ) - Arjuna (great archer, one with a mighty bow)

• गन्धर्वम् (gandharvam) - to the Gandharva

• कुरुसत्तमः (kurusattamaḥ) - Arjuna (best of the Kurus)

• जातकौतूहलः (jātakautūhalaḥ) - Arjuna, having become curious (one in whom curiosity has arisen)

• अतीव (atīva) - exceedingly, extremely

• वसिष्ठस्य (vasiṣṭhasya) - of Vasiṣṭha

• तपस्बलात् (tapasbalāt) - due to the power of austerity, from the strength of penance

Words meanings and morphology

उवाच (uvāca) - said, spoke

(verb)

3rd person , singular, active, perfect (lit) of √vac

Root: vac (class 2)

च (ca) - and, also

(indeclinable)

महेष्वासः (maheṣvāsaḥ) - Arjuna (great archer, one with a mighty bow)

(noun)

Nominative, masculine, singular of maheṣvāsa

maheṣvāsa - a great archer, one having a mighty bow

Compound type : bahuvrīhi (mahā+iṣu+āsa)

• mahā – great, mighty, large
  adjective (masculine)
• iṣu – arrow
  noun (masculine)
  Root: iṣ (class 6)
• āsa – mouth, face, arrow, bow
  noun (masculine)

गन्धर्वम् (gandharvam) - to the Gandharva

(noun)

Accusative, masculine, singular of gandharva

gandharva - a celestial musician, Gandharva

कुरुसत्तमः (kurusattamaḥ) - Arjuna (best of the Kurus)

(noun)

Nominative, masculine, singular of kurusattama

kurusattama - best among the Kurus

Compound type : tatpuruṣa (kuru+sattama)

• kuru – name of an ancient king; a descendant of Kuru; the region where the Kurus lived
  proper noun (masculine)
• sattama – best, excellent, most eminent
  adjective (masculine)
  Superlative degree from 'sat' (good)

जातकौतूहलः (jātakautūhalaḥ) - Arjuna, having become curious (one in whom curiosity has arisen)

(adjective)

Nominative, masculine, singular of jātakautūhala

jātakautūhala - having curiosity aroused, curious

Compound type : bahuvrīhi (jāta+kautūhala)

• jāta – born, arisen, produced, happened
  adjective (masculine)
  Past Passive Participle
  Derived from root √jan 'to be born'
  Root: jan (class 4)
• kautūhala – curiosity, eagerness, interest
  noun (neuter)

अतीव (atīva) - exceedingly, extremely

(indeclinable)

वसिष्ठस्य (vasiṣṭhasya) - of Vasiṣṭha

(proper noun)

Genitive, masculine, singular of vasiṣṭha

vasiṣṭha - Vasiṣṭha (name of a celebrated Vedic sage)

तपस्बलात् (tapasbalāt) - due to the power of austerity, from the strength of penance

(noun)

Ablative, neuter, singular of tapasbala

tapasbala - power of austerity (tapas), strength of penance

Compound type : ṣaṣṭhī-tatpuruṣa (tapas+bala)

• tapas – austerity, penance, spiritual fervor
  noun (neuter)
  Root: tap (class 1)
• bala – strength, power, force
  noun (neuter)