महाभारतः mahābhārataḥ - book-6, chapter-115, verse-38

आज्ञापय कुरुश्रेष्ठ सर्वशस्त्रभृतां वर ।
प्रेष्योऽहं तव दुर्धर्ष क्रियतां किं पितामह ॥३८॥

38. ājñāpaya kuruśreṣṭha sarvaśastrabhṛtāṁ vara ,
preṣyo'haṁ tava durdharṣa kriyatāṁ kiṁ pitāmaha.

38. ājñāpaya kuruśreṣṭha sarvaśastrabhṛtām vara
preṣyaḥ aham tava durdharṣa kriyatām kim pitāmaha

38. kuruśreṣṭha sarvaśastrabhṛtām vara durdharṣa pitāmaha
tava aham preṣyaḥ asmi kim kriyatām ājñāpaya

38. O best among the Kurus, O best among all weapon-bearers, O unconquerable one, grandfather (pitāmaha)! I am your servant. What shall be done? Please command me.

Words meanings summery:

• आज्ञापय (ājñāpaya) - Command me, give me orders (Command, order, instruct)

• कुरुश्रेष्ठ (kuruśreṣṭha) - O best among the Kuru warriors (addressing Arjuna or Duryodhana, contextually Arjuna) (O best among the Kurus)

• सर्वशस्त्रभृताम् (sarvaśastrabhṛtām) - Among all those who bear weapons (referring to warriors) (Of all weapon-bearers)

• वर (vara) - O excellent one, O best (vocative form addressing Bhishma) (Best, excellent, boon)

• प्रेष्यः (preṣyaḥ) - I am your devoted servant (Servant, messenger, attendant)

• अहम् (aham) - I (the speaker, Arjuna) (I)

• तव (tava) - Your (referring to Bhishma) (Your)

• दुर्धर्ष (durdharṣa) - O unconquerable one (addressing Bhishma) (Unconquerable, irresistible, difficult to assault)

• क्रियताम् (kriyatām) - What should be done (by me for you)? (Let it be done, let it be made)

• किम् (kim) - What (should be done)? (What? Why? Whether?)

• पितामह (pitāmaha) - O grandfather (addressing Bhishma) (Grandfather, great ancestor, Brahmā)

Words meanings and morphology

आज्ञापय (ājñāpaya) - Command me, give me orders (Command, order, instruct)

(verb)

2nd person , singular, active, imperative (loṭ) of ājñāpay

Causative verb

Derived from root jñā with prefix ā and causative suffix ṇic

Prefix: ā

Root: jñā (class 9)

कुरुश्रेष्ठ (kuruśreṣṭha) - O best among the Kuru warriors (addressing Arjuna or Duryodhana, contextually Arjuna) (O best among the Kurus)

(noun)

Vocative, masculine, singular of kuruśreṣṭha

kuruśreṣṭha - Best of the Kurus

Compound type : tatpuruṣa (kuru+śreṣṭha)

• kuru – A member of the Kuru dynasty; the Kuru country
  proper noun (masculine)
• śreṣṭha – Best, most excellent, chief
  adjective (masculine)
  Superlative degree of praśasya (excellent)

सर्वशस्त्रभृताम् (sarvaśastrabhṛtām) - Among all those who bear weapons (referring to warriors) (Of all weapon-bearers)

(noun)

Genitive, masculine, plural of sarvaśastrabhṛt

sarvaśastrabhṛt - Bearing all weapons, warrior

Compound type : tatpuruṣa (sarva+śastra+bhṛt)

• sarva – All, every, whole
  pronoun (masculine)
• śastra – Weapon, arms, instrument
  noun (neuter)
  Root: śas (class 2)
• bhṛt – Bearer, maintainer, carrying
  adjective (masculine)
  Agent noun/adjective
  Derived from root bhṛ
  Root: bhṛ (class 3)

वर (vara) - O excellent one, O best (vocative form addressing Bhishma) (Best, excellent, boon)

(adjective)

Vocative, masculine, singular of vara

vara - Excellent, best, choicest; a boon; a suitor

Root: vṛ (class 1)

प्रेष्यः (preṣyaḥ) - I am your devoted servant (Servant, messenger, attendant)

(noun)

Nominative, masculine, singular of preṣya

preṣya - To be sent, a messenger, a servant, an attendant

Gerundive/Past Passive Participle (potential sense)

Derived from root iṣ (to send) with prefix pra

Prefix: pra

Root: iṣ (class 4)

अहम् (aham) - I (the speaker, Arjuna) (I)

(pronoun)

Nominative, singular of aham

asmad - I, we

तव (tava) - Your (referring to Bhishma) (Your)

(pronoun)

Genitive, singular of tava

yuṣmad - You (singular or plural)

दुर्धर्ष (durdharṣa) - O unconquerable one (addressing Bhishma) (Unconquerable, irresistible, difficult to assault)

(adjective)

Vocative, masculine, singular of durdharṣa

durdharṣa - Unconquerable, irresistible, difficult to attack or overcome

Past Passive Participle (negative sense)

From root dhṛṣ with prefix dur (difficult)

Prefix: dur

Root: dhṛṣ (class 5)

क्रियताम् (kriyatām) - What should be done (by me for you)? (Let it be done, let it be made)

(verb)

3rd person , singular, passive, imperative (loṭ) of kriyatām

Imperative passive

Root: kṛ (class 8)

किम् (kim) - What (should be done)? (What? Why? Whether?)

(interrogative pronoun)

पितामह (pitāmaha) - O grandfather (addressing Bhishma) (Grandfather, great ancestor, Brahmā)

(noun)

Vocative, masculine, singular of pitāmaha

pitāmaha - Paternal grandfather; a great father; Brahmā