महाभारतः mahābhārataḥ - book-3, chapter-161, verse-17

ततः कदाचिद्धरिसंप्रयुक्तं महेन्द्रवाहं सहसोपयातम् ।
विद्युत्प्रभं प्रेक्ष्य महारथानां हर्षोऽर्जुनं चिन्तयतां बभूव ॥१७॥

17. tataḥ kadāciddharisaṁprayuktaṁ; mahendravāhaṁ sahasopayātam ,
vidyutprabhaṁ prekṣya mahārathānāṁ; harṣo'rjunaṁ cintayatāṁ babhūva.

17. tataḥ kadācit harisamprayuktam
mahendravāham sahasā upayātam
vidyutprabham prekṣya mahārathānām
harṣaḥ arjunam cintayatām babhūva

17. Then, one day, seeing the sudden arrival of Indra's vehicle, which was yoked with tawny horses (hari) and brilliant like lightning, joy arose among the great charioteers who were contemplating Arjuna.

Words meanings summery:

• ततः (tataḥ) - then (then, thence, from that)

• कदाचित् (kadācit) - one day, once (sometimes, at some time, once)

• हरिसम्प्रयुक्तम् (harisamprayuktam) - which was yoked with tawny horses (yoked with tawny horses)

• महेन्द्रवाहम् (mahendravāham) - Indra's vehicle (Indra's vehicle, Indra's chariot)

• सहसा (sahasā) - suddenly (suddenly, forcibly, quickly)

• उपयातम् (upayātam) - arrival (approached, arrived)

• विद्युत्प्रभम् (vidyutprabham) - brilliant like lightning (shining like lightning, brilliant like electricity)

• प्रेक्ष्य (prekṣya) - seeing (having seen, after seeing)

• महारथानाम् (mahārathānām) - among the great charioteers (of the great charioteers)

• हर्षः (harṣaḥ) - joy (joy, delight, elation)

• अर्जुनम् (arjunam) - Arjuna

• चिन्तयताम् (cintayatām) - who were contemplating (of those contemplating, while they were thinking)

• बभूव (babhūva) - arose, became (he/it became, he/it was)

Words meanings and morphology

ततः (tataḥ) - then (then, thence, from that)

(indeclinable)

From tad + tasil

कदाचित् (kadācit) - one day, once (sometimes, at some time, once)

(indeclinable)

kadā + cid

हरिसम्प्रयुक्तम् (harisamprayuktam) - which was yoked with tawny horses (yoked with tawny horses)

(adjective)

Accusative, neuter, singular of harisamprayukta

harisamprayukta - yoked with tawny horses

Compound

Compound type : tṛtīyā-tatpuruṣa (hari+saṃprayukta)

• hari – tawny, golden-brown, a horse
  noun (masculine)
• saṃprayukta – yoked, joined, connected, combined
  adjective (neuter)
  Past Passive Participle
  sam + pra + yuj + kta
  Prefixes: sam+pra
  Root: yuj (class 7)

Note: Used adjectivally.

महेन्द्रवाहम् (mahendravāham) - Indra's vehicle (Indra's vehicle, Indra's chariot)

(noun)

Accusative, neuter, singular of mahendravāha

mahendravāha - Indra's vehicle, chariot of Mahendra

Compound

Compound type : ṣaṣṭhī-tatpuruṣa (mahendra+vāha)

• mahendra – great Indra, chief Indra
  proper noun (masculine)
  Compound of mahā (great) and indra (Indra)
• vāha – vehicle, carrier, horse
  noun (masculine)

Note: Object of prekṣya.

सहसा (sahasā) - suddenly (suddenly, forcibly, quickly)

(indeclinable)

Instrumental form of sahas (power, force) used adverbially.

उपयातम् (upayātam) - arrival (approached, arrived)

(adjective)

Accusative, neuter, singular of upayāta

upayāta - approached, arrived, come near

Past Passive Participle

upa + yā + kta

Prefix: upa

Root: yā (class 2)

Note: Used adjectivally.

विद्युत्प्रभम् (vidyutprabham) - brilliant like lightning (shining like lightning, brilliant like electricity)

(adjective)

Accusative, neuter, singular of vidyutprabha

vidyutprabha - shining like lightning, brilliant like electricity

Compound

Compound type : bahuvrīhi (vidyut+prabhā)

• vidyut – lightning, electricity
  noun (feminine)
• prabhā – light, splendor, brilliance
  noun (feminine)

Note: In apposition to mahendravāham.

प्रेक्ष्य (prekṣya) - seeing (having seen, after seeing)

(indeclinable participle)

महारथानाम् (mahārathānām) - among the great charioteers (of the great charioteers)

(noun)

Genitive, masculine, plural of mahāratha

mahāratha - great charioteer, chief warrior

Compound

Compound type : karmadhāraya (mahā+ratha)

• mahā – great, large
  adjective (feminine)
  Adjectival stem of mahat
• ratha – chariot, warrior
  noun (masculine)

Note: Of the great charioteers (the Pāṇḍavas and their companions).

हर्षः (harṣaḥ) - joy (joy, delight, elation)

(noun)

Nominative, masculine, singular of harṣa

harṣa - joy, delight, elation, thrill

From root hṛṣ (to be excited, rejoice)

Root: hṛṣ (class 1)

अर्जुनम् (arjunam) - Arjuna

(proper noun)

Accusative, masculine, singular of arjuna

arjuna - Arjuna (name), white, silver-colored

चिन्तयताम् (cintayatām) - who were contemplating (of those contemplating, while they were thinking)

(participle)

Genitive, masculine, plural of cintayat

cintayat - contemplating, thinking, pondering

Present Active Participle (causative)

From cintay (causative of cit), śatṛ affix

Root: cit (class 10)

Note: Used adjectivally to describe the great charioteers.

बभूव (babhūva) - arose, became (he/it became, he/it was)

(verb)

3rd person , singular, active, perfect (Lit) of bhū

Perfect tense, 3rd person singular

Reduplicated perfect (Lit), Parasmaipada

Root: bhū (class 1)

Note: Subject is harṣaḥ.