महाभारतः mahābhārataḥ - book-9, chapter-15, verse-20

साध्विमौ मातुलं युद्धे क्षत्रधर्मपुरस्कृतौ ।
मदर्थं प्रतियुध्येतां मानार्हौ सत्यसंगरौ ॥२०॥

20. sādhvimau mātulaṁ yuddhe kṣatradharmapuraskṛtau ,
madarthaṁ pratiyudhyetāṁ mānārhau satyasaṁgarau.

20. sādhu imau mātulam yuddhe kṣatradharmapuraskṛtau
madartham pratiyudhyetām mānārhau satyasaṅgarau

20. sādhu,
imau kṣatradharmapuraskṛtau mānārhau satyasaṅgarau,
madartham mātulam yuddhe pratiyudhyetām.

20. Indeed, these two, upholding the warrior's (kṣatra) intrinsic nature (dharma), worthy of honor, and true to their pledges, should fight against their maternal uncle (Śalya) in battle for my sake.

Words meanings summery:

• साधु (sādhu) - well, indeed, properly

• इमौ (imau) - these two

• मातुलम् (mātulam) - Śalya (maternal uncle)

• युद्धे (yuddhe) - in battle, in combat

• क्षत्रधर्मपुरस्कृतौ (kṣatradharmapuraskṛtau) - placing the warrior's (kṣatra) intrinsic nature (dharma) foremost, upholding kṣatra-dharma

• मदर्थम् (madartham) - for my sake, for my purpose

• प्रतियुध्येताम् (pratiyudhyetām) - may they fight against, should they fight against

• मानार्हौ (mānārhau) - worthy of honor, deserving respect

• सत्यसङ्गरौ (satyasaṅgarau) - truthful in their vows/engagements, having true pledges

Words meanings and morphology

साधु (sādhu) - well, indeed, properly

(indeclinable)

इमौ (imau) - these two

(pronoun)

Nominative, masculine, dual of idam

idam - this, these

मातुलम् (mātulam) - Śalya (maternal uncle)

(noun)

Accusative, masculine, singular of mātula

mātula - maternal uncle

युद्धे (yuddhe) - in battle, in combat

(noun)

Locative, neuter, singular of yuddha

yuddha - battle, fight, war

क्षत्रधर्मपुरस्कृतौ (kṣatradharmapuraskṛtau) - placing the warrior's (kṣatra) intrinsic nature (dharma) foremost, upholding kṣatra-dharma

(adjective)

Nominative, masculine, dual of kṣatradharmapuraskṛta

kṣatradharmapuraskṛta - having the kṣatra-dharma as foremost, honoring the kṣatra-dharma

Compound type : tatpuruṣa (kṣatradharma+puraskṛta)

• kṣatradharma – the intrinsic nature (dharma) of a warrior (kṣatra), the duty of a kṣatriya
  noun (masculine)
• puraskṛta – placed in front, honored, esteemed, preferred
  participle (masculine)
  Past Passive Participle
  Derived from root 'kṛ' (to do) with prefix 'puras'.
  Prefix: puras
  Root: kṛ (class 8)

मदर्थम् (madartham) - for my sake, for my purpose

(indeclinable)

Compound type : tatpuruṣa (mat+artha)

• mat – my, of me
  pronoun
  Genitive singular of 'aham' (I)
• artha – purpose, meaning, object, wealth
  noun (masculine)

Note: Used adverbially to indicate purpose.

प्रतियुध्येताम् (pratiyudhyetām) - may they fight against, should they fight against

(verb)

3rd person , dual, middle, optative (vidhiliṅ) of pratiyudh

Prefix: prati

Root: yudh (class 4)

मानार्हौ (mānārhau) - worthy of honor, deserving respect

(adjective)

Nominative, masculine, dual of mānārha

mānārha - worthy of honor or respect

Compound type : tatpuruṣa (māna+arha)

• māna – honor, respect, pride
  noun (masculine)
• arha – deserving, worthy of, fit for
  adjective (masculine)
  Root: arh (class 1)

सत्यसङ्गरौ (satyasaṅgarau) - truthful in their vows/engagements, having true pledges

(adjective)

Nominative, masculine, dual of satyasaṅgara

satyasaṅgara - one whose vows/engagements are true

Compound type : bahuvrīhi (satya+saṅgara)

• satya – truth, true, real
  noun (neuter)
• saṅgara – vow, promise, engagement; battle
  noun (masculine)