महाभारतः mahābhārataḥ - book-5, chapter-139, verse-57

समुपानय कौन्तेयं युद्धाय मम केशव ।
मन्त्रसंवरणं कुर्वन्नित्यमेव परंतप ॥५७॥

57. samupānaya kaunteyaṁ yuddhāya mama keśava ,
mantrasaṁvaraṇaṁ kurvannityameva paraṁtapa.

57. samupānaya kaunteyam yuddhāya mama keśava
mantrasaṃvaraṇam kurvan nityam eva paraṃtapa

57. keśava paraṃtapa mama yuddhāya kaunteyam
samupānaya nityam eva mantrasaṃvaraṇam kurvan

57. O Keśava, O tormentor of foes (paraṃtapa), bring Kunti's son [Arjuna] for my battle, always maintaining the concealment of counsel (mantra).

Words meanings summery:

• समुपानय (samupānaya) - bring near, conduct (Arjuna) (bring near, conduct, lead, bring forth)

• कौन्तेयम् (kaunteyam) - Kunti's son, Arjuna

• युद्धाय (yuddhāya) - for battle (for battle, for war, for fighting)

• मम (mama) - my (my, of me)

• केशव (keśava) - O Keśava (a name for Krishna) (O Keshava, a name of Vishnu/Krishna)

• मन्त्रसंवरणम् (mantrasaṁvaraṇam) - maintaining the concealment of counsel (mantra) (concealment of counsel, keeping secrets)

• कुर्वन् (kurvan) - maintaining, doing (doing, performing, making, acting)

• नित्यम् (nityam) - always (always, constantly, perpetually, regularly)

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

• परंतप (paraṁtapa) - O tormentor of foes (paraṃtapa) (addressing Krishna) (O tormentor of enemies, O oppressor of foes (epithet of heroes))

Words meanings and morphology

समुपानय (samupānaya) - bring near, conduct (Arjuna) (bring near, conduct, lead, bring forth)

(verb)

2nd person , singular, active, imperative (loṭ) of sam-upa-nī

imperative active

1st conjugation, Parasmaipada, imperative mood, 2nd person singular

Prefixes: sam+upa

Root: nī (class 1)

कौन्तेयम् (kaunteyam) - Kunti's son, Arjuna

(proper noun)

Accusative, masculine, singular of kaunteya

kaunteya - son of Kunti, Arjuna

patronymic from Kunti

युद्धाय (yuddhāya) - for battle (for battle, for war, for fighting)

(noun)

Dative, neuter, singular of yuddha

yuddha - battle, war, fight

past passive participle (root √yudh)

derived from root √yudh 'to fight'

Root: yudh (class 4)

मम (mama) - my (my, of me)

(pronoun)

Genitive, singular of aham

aham - I

केशव (keśava) - O Keśava (a name for Krishna) (O Keshava, a name of Vishnu/Krishna)

(proper noun)

Vocative, masculine, singular of keśava

keśava - having beautiful hair; slayer of the demon Keśī; a name of Vishnu/Krishna

मन्त्रसंवरणम् (mantrasaṁvaraṇam) - maintaining the concealment of counsel (mantra) (concealment of counsel, keeping secrets)

(noun)

Accusative, neuter, singular of mantrasaṃvaraṇa

mantrasaṁvaraṇa - concealment of counsel or secret

Compound type : tatpurusha (mantra+saṃvaraṇa)

• mantra – sacred utterance, incantation, counsel, plan, secret
  noun (masculine)
• saṃvaraṇa – covering, concealing, keeping secret, restraining
  noun (neuter)
  derived from root √vṛ 'to cover, choose' with prefix sam-
  Prefix: sam
  Root: vṛ (class 5)

कुर्वन् (kurvan) - maintaining, doing (doing, performing, making, acting)

(participle)

Nominative, masculine, singular of kṛ

kṛ - to do, to make, to perform, to act

present active participle

8th conjugation, Parasmaipada, present participle

Root: kṛ (class 8)

Note: Adjective modifying the implied subject (Krishna).

नित्यम् (nityam) - always (always, constantly, perpetually, regularly)

(indeclinable)

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

(indeclinable)

परंतप (paraṁtapa) - O tormentor of foes (paraṃtapa) (addressing Krishna) (O tormentor of enemies, O oppressor of foes (epithet of heroes))

(noun)

Vocative, masculine, singular of paraṃtapa

paraṁtapa - tormentor of enemies, oppressor of foes

Compound type : tatpurusha (param+tapa)

• para – other, foreign, enemy
  noun (masculine)
• tapa – burning, heating, tormenting, one who torments
  noun (masculine)
  derived from root √tap 'to heat, torment'
  Root: tap (class 1)