महाभारतः mahābhārataḥ - book-8, chapter-31, verse-16

निदेशात्सूतपुत्रस्य सरथाः साश्वपत्तयः ।
आह्वयन्तोऽर्जुनं तस्थुः केशवं च महाबलम् ॥१६॥

16. nideśātsūtaputrasya sarathāḥ sāśvapattayaḥ ,
āhvayanto'rjunaṁ tasthuḥ keśavaṁ ca mahābalam.

16. nideśāt sūtaputrasya sarathāḥ sāśvapattayaḥ
āhvayantaḥ arjunam tasthuḥ keśavam ca mahābalam

16. sūtaputrasya nideśāt sarathāḥ sāśvapattayaḥ
arjunam ca mahābalam keśavam āhvayantaḥ tasthuḥ

16. At the command of Karṇa, the son of Sūta, those with chariots, horses, and foot soldiers took their positions, challenging Arjuna and the mighty Keśava.

Words meanings summery:

• निदेशात् (nideśāt) - from the command; by the order; at the behest

• सूतपुत्रस्य (sūtaputrasya) - of Karṇa (of the son of Sūta; of Karṇa)

• सरथाः (sarathāḥ) - with chariots; having chariots

• साश्वपत्तयः (sāśvapattayaḥ) - with horses and foot soldiers

• आह्वयन्तः (āhvayantaḥ) - challenging, calling out, inviting

• अर्जुनम् (arjunam) - Arjuna

• तस्थुः (tasthuḥ) - they stood; they took position

• केशवम् (keśavam) - Keśava (a name of Krishna)

• च (ca) - and

• महाबलम् (mahābalam) - mighty, very strong

Words meanings and morphology

निदेशात् (nideśāt) - from the command; by the order; at the behest

(noun)

Ablative, masculine, singular of nideśa

nideśa - command, order, instruction

Prefix: ni

Root: diś (class 6)

सूतपुत्रस्य (sūtaputrasya) - of Karṇa (of the son of Sūta; of Karṇa)

(noun)

Genitive, masculine, singular of sūtaputra

sūtaputra - son of a charioteer

Compound type : tatpuruṣa (sūta+putra)

• sūta – charioteer, bard, one born of a Kṣatriya father and Brāhmaṇa mother
  noun (masculine)
• putra – son, child
  noun (masculine)

सरथाः (sarathāḥ) - with chariots; having chariots

(adjective)

Nominative, masculine, plural of saratha

saratha - with chariots, accompanied by chariots

Compound type : bahuvrīhi (sa+ratha)

• sa – with, together with
  indeclinable
• ratha – chariot, car
  noun (masculine)

साश्वपत्तयः (sāśvapattayaḥ) - with horses and foot soldiers

(adjective)

Nominative, masculine, plural of sāśvapatti

sāśvapatti - with horses and foot soldiers

Compound type : bahuvrīhi (sa+aśva+patti)

• sa – with, together with
  indeclinable
• aśva – horse
  noun (masculine)
• patti – foot soldier, infantry
  noun (masculine)

आह्वयन्तः (āhvayantaḥ) - challenging, calling out, inviting

(participle)

Nominative, masculine, plural of āhvayat

āhvayat - challenging, calling

Present Active Participle

Prefix: ā

Root: hve (class 1)

अर्जुनम् (arjunam) - Arjuna

(proper noun)

Accusative, masculine, singular of arjuna

arjuna - Arjuna (name of a hero), white, clear

तस्थुः (tasthuḥ) - they stood; they took position

(verb)

3rd person , plural, active, perfect (liṭ) of sthā

Root: sthā (class 1)

केशवम् (keśavam) - Keśava (a name of Krishna)

(proper noun)

Accusative, masculine, singular of keśava

keśava - Keśava (an epithet of Vishnu/Krishna), having long or beautiful hair

च (ca) - and

(indeclinable)

महाबलम् (mahābalam) - mighty, very strong

(adjective)

Accusative, masculine, singular of mahābala

mahābala - great strength, mighty, very powerful

Compound type : bahuvrīhi (mahā+bala)

• mahā – great, large
  adjective
• bala – strength, power, might
  noun (neuter)