महाभारतः mahābhārataḥ - book-6, chapter-1, verse-26

ततस्ते समयं चक्रुः कुरुपाण्डवसोमकाः ।
धर्मांश्च स्थापयामासुर्युद्धानां भरतर्षभ ॥२६॥

26. tataste samayaṁ cakruḥ kurupāṇḍavasomakāḥ ,
dharmāṁśca sthāpayāmāsuryuddhānāṁ bharatarṣabha.

26. tataḥ te samayam cakruḥ kurupāṇḍavasomakāḥ
dharmān ca sthāpayāmāsuḥ yuddhānām bharatarṣabha

26. bharatarṣabha tataḥ te kurupāṇḍavasomakāḥ
samayam cakruḥ ca yuddhānām dharmān sthāpayāmāsuḥ

26. Then, O best among Bharatas, the Kurus, Pandavas, and Somakas made an agreement and established the codes of conduct (dharma) for the battles.

Words meanings summery:

• ततः (tataḥ) - then (then, thereupon, from that)

• ते (te) - they (they, those)

• समयम् (samayam) - agreement (agreement, pact, convention, appointed time)

• चक्रुः (cakruḥ) - they made (they made, they did)

• कुरुपाण्डवसोमकाः (kurupāṇḍavasomakāḥ) - the Kurus, Pandavas, and Somakas

• धर्मान् (dharmān) - codes of conduct (dharma) (rules, laws, duties, righteous acts)

• च (ca) - and (and, also)

• स्थापयामासुः (sthāpayāmāsuḥ) - they established (they established, they caused to stand)

• युद्धानाम् (yuddhānām) - for the battles (of battles, of wars)

• भरतर्षभ (bharatarṣabha) - O best among Bharatas (O best among Bharatas, O bull of Bharatas)

Words meanings and morphology

ततः (tataḥ) - then (then, thereupon, from that)

(indeclinable)

ते (te) - they (they, those)

(pronoun)

Nominative, masculine, plural of tad

tad - that, he, she, it

समयम् (samayam) - agreement (agreement, pact, convention, appointed time)

(noun)

Accusative, masculine, singular of samaya

samaya - agreement, convention, stipulation, appointed time, opportunity, religious observance, doctrine

चक्रुः (cakruḥ) - they made (they made, they did)

(verb)

3rd person , plural, active, perfect (lit) of kṛ

Root: kṛ (class 8)

कुरुपाण्डवसोमकाः (kurupāṇḍavasomakāḥ) - the Kurus, Pandavas, and Somakas

(proper noun)

Nominative, masculine, plural of kurupāṇḍavasomaka

kurupāṇḍavasomaka - a group composed of Kurus, Pandavas, and Somakas

Compound type : dvandva (kuru+pāṇḍava+somaka)

• kuru – name of an ancient Vedic tribe and their territory
  proper noun (masculine)
• pāṇḍava – descendant of Pāṇḍu, name of the five brothers in the Mahābhārata
  proper noun (masculine)
• somaka – name of a king or a clan, usually associated with the Pāñcālas
  proper noun (masculine)

धर्मान् (dharmān) - codes of conduct (dharma) (rules, laws, duties, righteous acts)

(noun)

Accusative, masculine, plural of dharma

dharma - duty, righteousness, law, justice, virtue, religious or moral merit, constitution, natural law, intrinsic nature

च (ca) - and (and, also)

(indeclinable)

स्थापयामासुः (sthāpayāmāsuḥ) - they established (they established, they caused to stand)

(verb)

3rd person , plural, active, perfect (lit) of sthāp

causative

root sthā (to stand) with causative suffix -p

Root: sthā (class 1)

युद्धानाम् (yuddhānām) - for the battles (of battles, of wars)

(noun)

Genitive, neuter, plural of yuddha

yuddha - battle, fight, war

past passive participle

from root yudh (to fight)

Root: yudh (class 4)

भरतर्षभ (bharatarṣabha) - O best among Bharatas (O best among Bharatas, O bull of Bharatas)

(proper noun)

Vocative, masculine, singular of bharatarṣabha

bharatarṣabha - bull of Bharata, best of Bharatas (an epithet for Dhṛtarāṣṭra or other great warriors of the Bharata lineage)

Compound type : tatpuruṣa (bharata+ṛṣabha)

• bharata – name of an ancient king, a descendant of Bharata, an Indian
  proper noun (masculine)
• ṛṣabha – bull, best, chief, excellent
  noun (masculine)