महाभारतः mahābhārataḥ - book-5, chapter-70, verse-80

शमं तत्र लभेयं चेद्युष्मदर्थमहापयन् ।
पुण्यं मे सुमहद्राजंश्चरितं स्यान्महाफलम् ॥८०॥

80. śamaṁ tatra labheyaṁ cedyuṣmadarthamahāpayan ,
puṇyaṁ me sumahadrājaṁścaritaṁ syānmahāphalam.

80. śamam tatra labheyam cet yuṣmadartham āpayan
puṇyam me sumahat rājan caritam syāt mahāphalam

80. "If I can achieve peace there, by securing your interests, O King, then my action would be considered highly meritorious and bear great fruit."

Words meanings summery:

• शमम् (śamam) - A state of peace between the warring parties. (peace, tranquility, cessation, pacification)

• तत्र (tatra) - In the Kuru assembly. (there, in that place)

• लभेयम् (labheyam) - I would obtain, I might obtain

• चेत् (cet) - if

• युष्मदर्थम् (yuṣmadartham) - For the sake of the Pāṇḍavas. (for your sake, for your purpose, for your benefit)

• आपयन् (āpayan) - Bringing about the benefit of the Pāṇḍavas. (causing to obtain, effecting, bringing about)

• पुण्यम् (puṇyam) - Refers to the meritorious nature of Kṛṣṇa's action. (merit, virtue, righteous deed)

• मे (me) - My (referring to Janārdana/Kṛṣṇa). (my, to me, for me)

• सुमहत् (sumahat) - Very great (merit). (very great, very large, immense)

• राजन् (rājan) - O Yudhiṣṭhira. (O King)

• चरितम् (caritam) - Kṛṣṇa's action of going to the Kuru assembly. (deed, conduct, action, behavior)

• स्यात् (syāt) - would be, might be, may be

• महाफलम् (mahāphalam) - Bearing great positive results. (of great fruit, greatly rewarding, highly beneficial)

Words meanings and morphology

शमम् (śamam) - A state of peace between the warring parties. (peace, tranquility, cessation, pacification)

(noun)

Accusative, masculine, singular of śama

śama - peace, tranquility, quiet, cessation, control of mind

Derived from √śam (to be quiet, calm)

Root: śam (class 1)

तत्र (tatra) - In the Kuru assembly. (there, in that place)

(indeclinable)

Locative of tad (that)

लभेयम् (labheyam) - I would obtain, I might obtain

(verb)

1st person , singular, middle, optative (liṅ) of labh

Optative mood, 1st person singular

From √labh, 1st conjugation, āmanepada (middle voice)

Root: labh (class 1)

चेत् (cet) - if

(indeclinable)

Conjunction

युष्मदर्थम् (yuṣmadartham) - For the sake of the Pāṇḍavas. (for your sake, for your purpose, for your benefit)

(noun)

Accusative, masculine, singular of yuṣmadartha

yuṣmadartha - for your sake, for your purpose, for your interest

Compound type : tatpuruṣa (yuṣmad+artha)

• yuṣmad – you (pronoun)
  pronoun
• artha – purpose, meaning, wealth, object, sake, thing, benefit
  noun (masculine)

आपयन् (āpayan) - Bringing about the benefit of the Pāṇḍavas. (causing to obtain, effecting, bringing about)

(adjective)

Nominative, masculine, singular of āpayat

āpayat - causing to obtain, effecting, accomplishing

Present Active Participle (causative)

From ā-√āp (to obtain) in causative form.

Prefix: ā

Root: āp (class 5)

पुण्यम् (puṇyam) - Refers to the meritorious nature of Kṛṣṇa's action. (merit, virtue, righteous deed)

(noun)

Nominative, neuter, singular of puṇya

puṇya - meritorious, virtuous, righteous; merit, virtue, righteous deed

मे (me) - My (referring to Janārdana/Kṛṣṇa). (my, to me, for me)

(pronoun)

Genitive, singular of asmad

asmad - I, me (pronoun)

Enclitic form of 1st person singular

सुमहत् (sumahat) - Very great (merit). (very great, very large, immense)

(adjective)

Nominative, neuter, singular of sumahat

sumahat - very great, immense, highly esteemed

Compound of su (very) and mahat (great)

Compound type : karmadhāraya (su+mahat)

• su – good, well, very, excellent
  indeclinable
  Prefix/adverb
• mahat – great, large, important
  adjective (neuter)

Note: This modifies `puṇyam` and `caritam`.

राजन् (rājan) - O Yudhiṣṭhira. (O King)

(noun)

Vocative, masculine, singular of rājan

rājan - king, ruler

Root: rāj (class 1)

चरितम् (caritam) - Kṛṣṇa's action of going to the Kuru assembly. (deed, conduct, action, behavior)

(noun)

Nominative, neuter, singular of carita

carita - conduct, deed, action, character, behavior, history

From √car (to move, act)

Root: car (class 1)

स्यात् (syāt) - would be, might be, may be

(verb)

3rd person , singular, active, optative (liṅ) of as

Optative mood, 3rd person singular

From √as (to be)

Root: as (class 2)

महाफलम् (mahāphalam) - Bearing great positive results. (of great fruit, greatly rewarding, highly beneficial)

(adjective)

Nominative, neuter, singular of mahāphala

mahāphala - having great fruit, highly beneficial, greatly rewarding

Compound of mahā (great) and phala (fruit, result)

Compound type : bahuvrīhi (mahā+phala)

• mahā – great, mighty, large
  adjective (feminine)
  Feminine stem of mahat used as first member of compound
• phala – fruit, result, consequence, reward
  noun (neuter)

Note: Predicate adjective for `caritam`.