महाभारतः mahābhārataḥ - book-1, chapter-123, verse-48

मद्वाक्यसमकालं च शिरोऽस्य विनिपात्यताम् ।
एकैकशो नियोक्ष्यामि तथा कुरुत पुत्रकाः ॥४८॥

48. madvākyasamakālaṁ ca śiro'sya vinipātyatām ,
ekaikaśo niyokṣyāmi tathā kuruta putrakāḥ.

48. mat-vākya-samakālaṃ ca śiraḥ asya vinipātyatām
| ekaikaśaḥ niyokṣyāmi tathā kuruta putrakāḥ

48. And as soon as I give the word, its head must be struck down. I will instruct each of you individually; my sons, do as I say.

Words meanings summery:

• मत्-वाक्य-समकालम् (mat-vākya-samakālam) - at the same time as my words, concurrent with my command

• च (ca) - and, also

• शिरः (śiraḥ) - head

• अस्य (asya) - of this, its

• विनिपात्यताम् (vinipātyatām) - let it be struck down, let it be caused to fall

• एकैकशः (ekaikaśaḥ) - one by one, individually

• नियोक्ष्यामि (niyokṣyāmi) - I will instruct, I will engage, I will command

• तथा (tathā) - thus, so, in that manner

• कुरुत (kuruta) - do, perform, make (plural imperative)

• पुत्रकाः (putrakāḥ) - O sons!

Words meanings and morphology

मत्-वाक्य-समकालम् (mat-vākya-samakālam) - at the same time as my words, concurrent with my command

(noun)

Accusative, neuter, singular of mat-vākya-samakāla

mat-vākya-samakāla - concurrent with my speech, at the same time as my command

Compound type : tatpuruṣa (mad+vākya+samakāla)

• mad – my, mine (from asmad)
  pronoun
  From asmad (1st person pronoun)
• vākya – speech, word, sentence
  noun (neuter)
  From √vac (to speak)
  Root: vac (class 2)
• samakāla – simultaneous, at the same time
  adjective (masculine)

Note: Used adverbially here

च (ca) - and, also

(indeclinable)

शिरः (śiraḥ) - head

(noun)

Nominative, neuter, singular of śiras

śiras - head, top, peak

अस्य (asya) - of this, its

(pronoun)

Genitive, neuter, singular of idam

idam - this, that, it

विनिपात्यताम् (vinipātyatām) - let it be struck down, let it be caused to fall

(verb)

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

3rd person singular imperative passive of √pat (to fall) with prefixes vi- and ni-

Prefixes: vi+ni

Root: pat (class 1)

एकैकशः (ekaikaśaḥ) - one by one, individually

(indeclinable)

From ekaika (one by one) + suffix -śas

नियोक्ष्यामि (niyokṣyāmi) - I will instruct, I will engage, I will command

(verb)

1st person , singular, active, future (lṛṭ) of niyuj

1st person singular future of √yuj (to join) with prefix ni-

Prefix: ni

Root: yuj (class 7)

तथा (tathā) - thus, so, in that manner

(indeclinable)

कुरुत (kuruta) - do, perform, make (plural imperative)

(verb)

2nd person , plural, active, imperative (loṭ) of kṛ

2nd person plural imperative of √kṛ

Root: kṛ (class 8)

पुत्रकाः (putrakāḥ) - O sons!

(noun)

Vocative, masculine, plural of putraka

putraka - son (often diminutive or affectionate)

From putra (son) + suffix -ka