महाभारतः mahābhārataḥ - book-5, chapter-164, verse-18

हन्यादेकरथेनैव देवगन्धर्वदानवान् ।
एकीभूतानपि रणे दिव्यैरस्त्रैः प्रतापवान् ॥१८॥

18. hanyādekarathenaiva devagandharvadānavān ,
ekībhūtānapi raṇe divyairastraiḥ pratāpavān.

18. hanyāt eka-rathena eva deva-gandharva-dānavān
ekībhūtān api raṇe divyaiḥ astraiḥ pratāpavān

18. pratāpavān eka-rathena eva divyaiḥ astraiḥ raṇe
ekībhūtān api deva-gandharva-dānavān hanyāt

18. That mighty (pratāpavān) one (Arjuna), with his divine weapons, could indeed slay the gods, gandharvas, and dānavas, even if they were united in battle, all from a single chariot.

Words meanings summery:

• हन्यात् (hanyāt) - he should kill, he might kill, he would kill

• एक-रथेन (eka-rathena) - all by himself in a single chariot (by a single chariot, with one chariot)

• एव (eva) - indeed, certainly, only, just

• देव-गन्धर्व-दानवान् (deva-gandharva-dānavān) - gods, gandharvas, and dānavas (demons)

• एकीभूतान् (ekībhūtān) - united, gathered, combined

• अपि (api) - even, also, too

• रणे (raṇe) - in battle, in war

• दिव्यैः (divyaiḥ) - by divine, by celestial

• अस्त्रैः (astraiḥ) - by weapons, by missiles

• प्रतापवान् (pratāpavān) - the mighty one (Arjuna) (mighty, powerful, glorious)

Words meanings and morphology

हन्यात् (hanyāt) - he should kill, he might kill, he would kill

(verb)

3rd person , singular, active, potential_optative (liṅ) of han

Potential/Optative Active

3rd person singular, Parasmaipada

Root: han (class 2)

एक-रथेन (eka-rathena) - all by himself in a single chariot (by a single chariot, with one chariot)

(noun)

Instrumental, masculine, singular of eka-ratha

eka-ratha - a single chariot, riding on a single chariot

Compound type : bahuvrīhi (eka+ratha)

• eka – one, single
  numeral
• ratha – chariot
  noun (masculine)
  Root: ram (class 1)

Note: Acts adverbially here, implying 'alone' or 'single-handedly'.

एव (eva) - indeed, certainly, only, just

(indeclinable)

Note: Emphatic particle.

देव-गन्धर्व-दानवान् (deva-gandharva-dānavān) - gods, gandharvas, and dānavas (demons)

(noun)

Accusative, masculine, plural of deva-gandharva-dānava

deva-gandharva-dānava - gods, gandharvas, and dānavas

Compound type : dvandva (deva+gandharva+dānava)

• deva – god, divine being
  noun (masculine)
  Root: div (class 4)
• gandharva – celestial musician, a class of demigods
  noun (masculine)
• dānava – demon, son of Danu
  noun (masculine)

एकीभूतान् (ekībhūtān) - united, gathered, combined

(adjective)

Accusative, masculine, plural of ekībhūta

ekībhūta - united, combined, gathered into one

Past Passive Participle

Derived from 'ekībhū' (to become one)

Prefix: ekī

Root: bhū (class 1)

Note: Qualifies `deva-gandharva-dānavān`.

अपि (api) - even, also, too

(indeclinable)

Note: Emphatic, 'even if united'.

रणे (raṇe) - in battle, in war

(noun)

Locative, masculine, singular of raṇa

raṇa - battle, war, combat

Root: raṇ (class 1)

दिव्यैः (divyaiḥ) - by divine, by celestial

(adjective)

Instrumental, masculine, plural of divya

divya - divine, celestial, wonderful

Root: div (class 4)

Note: Agrees with `astraiḥ`.

अस्त्रैः (astraiḥ) - by weapons, by missiles

(noun)

Instrumental, neuter, plural of astra

astra - weapon, missile

Root: as (class 4)

Note: Masculine form 'astraiḥ' is used here, agreeing with 'divyaiḥ', though 'astra' is typically neuter. It's not uncommon for neuter nouns to take masculine endings when used adjectivally or in certain contexts, or it could be a variant.

प्रतापवान् (pratāpavān) - the mighty one (Arjuna) (mighty, powerful, glorious)

(adjective)

Nominative, masculine, singular of pratāpavat

pratāpavat - glorious, mighty, powerful, majestic

possessive suffix -vat

Prefix: pra

Root: tap (class 1)

Note: Acts as the subject, implying 'he who possesses great power'.