महाभारतः mahābhārataḥ - book-5, chapter-63, verse-7

सात्यकिश्चापि दुर्धर्षः संमतोऽन्धकवृष्णिषु ।
ध्वंसयिष्यति ते सेनां पाण्डवेयहिते रतः ॥७॥

7. sātyakiścāpi durdharṣaḥ saṁmato'ndhakavṛṣṇiṣu ,
dhvaṁsayiṣyati te senāṁ pāṇḍaveyahite rataḥ.

7. sātyakiḥ ca api durdharṣaḥ saṃmataḥ andhakavṛṣṇiṣu
dhvaṃsayiṣyati te senām pāṇḍaveyahite rataḥ

7. And Sātyaki, the unconquerable hero, honored among the Andhakas and Vṛṣṇis, who is devoted to the welfare of the Pāṇḍavas, will also certainly destroy your army.

Words meanings summery:

• सात्यकिः (sātyakiḥ) - Satyaki (name of a hero)

• च (ca) - and, also

• अपि (api) - also, even, too

• दुर्धर्षः (durdharṣaḥ) - unconquerable, irresistible, difficult to attack

• संमतः (saṁmataḥ) - honored, esteemed, approved

• अन्धकवृष्णिषु (andhakavṛṣṇiṣu) - among the clans of the Yadu dynasty (among the Andhakas and Vṛṣṇis)

• ध्वंसयिष्यति (dhvaṁsayiṣyati) - will destroy, will annihilate

• ते (te) - your (army) (referring to Duryodhana) (your, to you, for you)

• सेनाम् (senām) - army, host

• पाण्डवेयहिते (pāṇḍaveyahite) - in the welfare of the Pandavas, devoted to the benefit of the Pandavas

• रतः (rataḥ) - devoted to, engaged in, delighting in

Words meanings and morphology

सात्यकिः (sātyakiḥ) - Satyaki (name of a hero)

(proper noun)

Nominative, masculine, singular of sātyaki

sātyaki - Satyaki (a Yadava warrior, Kṛṣṇa's charioteer and friend)

Patronymic of Satyakā

च (ca) - and, also

(indeclinable)

अपि (api) - also, even, too

(indeclinable)

दुर्धर्षः (durdharṣaḥ) - unconquerable, irresistible, difficult to attack

(adjective)

Nominative, masculine, singular of durdharṣa

durdharṣa - unconquerable, irresistible, invincible, formidable

From dur (difficult) + root dhṛṣ (to dare, to attack)

Compound type : karmadhāraya (dur+dhṛṣa)

• dur – bad, difficult, ill
  indeclinable
  Prefix
• dhṛṣa – daring, boldness, attacking
  noun (masculine)
  Derived from root dhṛṣ
  Root: dhṛṣ

Note: Qualifies Satyaki.

संमतः (saṁmataḥ) - honored, esteemed, approved

(adjective)

Nominative, masculine, singular of saṃmata

saṁmata - respected, approved, agreeable, honored

past passive participle

From sam-man (to agree, respect)

Prefix: sam

Root: man (class 4)

Note: Qualifies Satyaki.

अन्धकवृष्णिषु (andhakavṛṣṇiṣu) - among the clans of the Yadu dynasty (among the Andhakas and Vṛṣṇis)

(proper noun)

Locative, masculine, plural of andhakavṛṣṇi

andhakavṛṣṇi - the Andhakas and Vṛṣṇis (two branches of the Yadu dynasty)

Compound type : dvandva (andhaka+vṛṣṇi)

• andhaka – a clan name, descendants of Andhaka
  proper noun (masculine)
• vṛṣṇi – a clan name, descendants of Vṛṣṇi
  proper noun (masculine)

Note: Refers to the collective group of clans.

ध्वंसयिष्यति (dhvaṁsayiṣyati) - will destroy, will annihilate

(verb)

3rd person , singular, active, future indicative (lṛṭ) of dhvaṃs

future tense

Causative of root dhvaṃs (to fall, perish), future tense active third person singular

Root: dhvaṃs (class 1)

ते (te) - your (army) (referring to Duryodhana) (your, to you, for you)

(pronoun)

Genitive, singular of tvad

tvad - you (pronoun)

Enclitic form of the 2nd person pronoun

सेनाम् (senām) - army, host

(noun)

Accusative, feminine, singular of senā

senā - army, host, military force

Note: Object of `dhvaṃsayiṣyati`.

पाण्डवेयहिते (pāṇḍaveyahite) - in the welfare of the Pandavas, devoted to the benefit of the Pandavas

(noun)

Locative, neuter, singular of pāṇḍaveyahita

pāṇḍaveyahita - welfare/benefit of the sons of Pāṇḍu, devoted to the Pāṇḍavas' well-being

Compound type : tatpurusha (pāṇḍaveya+hita)

• pāṇḍaveya – son of Pāṇḍu, descendant of Pāṇḍu (a Pāṇḍava)
  noun (masculine)
  Patronymic from Pāṇḍu
• hita – welfare, benefit, good, advantageous
  noun (neuter)
  Past Passive Participle of dhā (to place), used as a noun
  Root: dhā (class 3)

रतः (rataḥ) - devoted to, engaged in, delighting in

(adjective)

Nominative, masculine, singular of rata

rata - devoted to, engaged in, intent on, delighting in

past passive participle

Past participle of root ram (to delight, to be pleased)

Root: ram (class 1)

Note: Often used in compounds as 'devoted to [X]'.