महाभारतः mahābhārataḥ - book-1, chapter-219, verse-16

नैतौ शक्यौ दुराधर्षौ विजेतुमजितौ युधि ।
अपि सर्वेषु लोकेषु पुराणावृषिसत्तमौ ॥१६॥

16. naitau śakyau durādharṣau vijetumajitau yudhi ,
api sarveṣu lokeṣu purāṇāvṛṣisattamau.

16. na etau śakyau durādharṣau vijetum ajitau
yudhi api sarveṣu lokeṣu purāṇau ṛṣisattamau

16. These two, the ancient and supreme sages (ṛṣisattama), are unconquerable (durādharṣa) and invincible (ajita) in battle. They cannot be defeated, even in all worlds.

Words meanings summery:

• न (na) - not, no

• एतौ (etau) - these two

• शक्यौ (śakyau) - capable of being conquered (by anyone) (capable (dual), possible)

• दुराधर्षौ (durādharṣau) - unconquerable, difficult to attack/subdue (dual)

• विजेतुम् (vijetum) - to conquer, to defeat

• अजितौ (ajitau) - unconquered, invincible (dual)

• युधि (yudhi) - in battle, in war

• अपि (api) - even, also

• सर्वेषु (sarveṣu) - in all

• लोकेषु (lokeṣu) - in the worlds

• पुराणौ (purāṇau) - ancient (dual)

• ऋषिसत्तमौ (ṛṣisattamau) - supreme sages (best of sages (dual))

Words meanings and morphology

न (na) - not, no

(indeclinable)

एतौ (etau) - these two

(pronoun)

Nominative, masculine, dual of etad

etad - this, these

Note: Refers to Nara and Nārāyaṇa.

शक्यौ (śakyau) - capable of being conquered (by anyone) (capable (dual), possible)

(adjective)

Nominative, masculine, dual of śakya

śakya - possible, capable, able to be done

Gerundive

Derived from root śak (to be able) with the suffix -ya

Root: śak (class 5)

दुराधर्षौ (durādharṣau) - unconquerable, difficult to attack/subdue (dual)

(adjective)

Nominative, masculine, dual of durādharṣa

durādharṣa - difficult to attack, unconquerable, unassailable, formidable

Compound of prefix dur- (difficult) and ādhṛṣa (to be attacked/defied), derived from root dhṛṣ (to be bold) with prefix ā-

Compound type : Pradi-tatpurusha (dur+ādhṛṣa)

• dur – difficult, bad, evil
  indeclinable
• ādhṛṣa – one who can be attacked/defied, daring
  adjective (masculine)
  Verbal adjective (implied passive sense of a gerundive)
  Derived from root dhṛṣ (to be bold, daring) with prefix ā-
  Prefix: ā
  Root: dhṛṣ (class 5)

विजेतुम् (vijetum) - to conquer, to defeat

(indeclinable)

Infinitive

Infinitive form of the root ji (to conquer) with prefix vi-

Prefix: vi

Root: ji (class 1)

अजितौ (ajitau) - unconquered, invincible (dual)

(adjective)

Nominative, masculine, dual of ajita

ajita - unconquered, invincible, unsubdued

Past Passive Participle (negated)

Negative particle a- + jita (conquered, past passive participle of ji)

Compound type : Nañ-tatpuruṣa (a+jita)

• a – not, un-
  indeclinable
• jita – conquered, subdued, won
  adjective (masculine)
  Past Passive Participle
  Derived from root ji (to conquer)
  Root: ji (class 1)

युधि (yudhi) - in battle, in war

(noun)

Locative, feminine, singular of yudh

yudh - battle, war, fight

अपि (api) - even, also

(indeclinable)

Note: Emphasizes the scope of the statement.

सर्वेषु (sarveṣu) - in all

(pronoun)

Locative, masculine, plural of sarva

sarva - all, every, whole, complete

Note: Modifies 'lokeṣu'.

लोकेषु (lokeṣu) - in the worlds

(noun)

Locative, masculine, plural of loka

loka - world, region, people, realm

पुराणौ (purāṇau) - ancient (dual)

(adjective)

Nominative, masculine, dual of purāṇa

purāṇa - ancient, old, venerable; (as noun) an ancient tale or legend

From purā (formerly)

ऋषिसत्तमौ (ṛṣisattamau) - supreme sages (best of sages (dual))

(noun)

Nominative, masculine, dual of ṛṣisattama

ṛṣisattama - best of sages, supreme sage

Compound type : Ṣaṣṭhī-tatpuruṣa (ṛṣi+sattama)

• ṛṣi – sage, seer, inspired poet
  noun (masculine)
• sattama – best, most excellent, supreme
  adjective (masculine)
  Superlative suffix -tama

Note: Refers to Nara and Nārāyaṇa.