महाभारतः mahābhārataḥ - book-3, chapter-42, verse-35

ततोऽब्रवीद्देवराजः पार्थमक्लिष्टकारिणम् ।
सान्त्वयञ्श्लक्ष्णया वाचा मेघदुन्दुभिनिस्वनः ॥३५॥

35. tato'bravīddevarājaḥ pārthamakliṣṭakāriṇam ,
sāntvayañślakṣṇayā vācā meghadundubhinisvanaḥ.

35. tataḥ abravīt devarājaḥ pārtham akliṣṭakāriṇam
sāntvayan ślakṣṇayā vācā meghadundubhinisvanaḥ

35. Then Indra, the king of the gods, whose voice resembled the roar of thunder and a war-drum, spoke to Pārtha (Arjuna), the tireless performer of deeds, comforting him with gentle words.

Words meanings summery:

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

• अब्रवीत् (abravīt) - spoke, said, told

• देवराजः (devarājaḥ) - Indra, the king of the gods (king of the gods, Indra)

• पार्थम् (pārtham) - to Pārtha, to Arjuna

• अक्लिष्टकारिणम् (akliṣṭakāriṇam) - Arjuna, who is a tireless performer of deeds (one who performs deeds effortlessly, tireless doer)

• सान्त्वयन् (sāntvayan) - comforting, placating, consoling

• श्लक्ष्णया (ślakṣṇayā) - with gentle words (with gentle, with soft, with smooth)

• वाचा (vācā) - by speech, with words, by voice

• मेघदुन्दुभिनिस्वनः (meghadundubhinisvanaḥ) - Indra, whose voice is like thunder and a war-drum (whose sound is like thunder and a war-drum)

Words meanings and morphology

ततः (tataḥ) - then, thereupon, from that

(indeclinable)

अब्रवीत् (abravīt) - spoke, said, told

(verb)

3rd person , singular, active, imperfect (laṅ) of √brū

Root: brū (class 2)

देवराजः (devarājaḥ) - Indra, the king of the gods (king of the gods, Indra)

(noun)

Nominative, masculine, singular of devarāja

devarāja - king of the gods, chief of the gods

Compound type : tatpurusha (deva+rāja)

• deva – god, deity
  noun (masculine)
• rāja – king, ruler
  noun (masculine)

Note: Referring to Indra.

पार्थम् (pārtham) - to Pārtha, to Arjuna

(proper noun)

Accusative, masculine, singular of pārtha

pārtha - son of Pṛthā (Kunti), Arjuna

Derived from Pṛthā (Kunti) + aṇ (patronymic suffix)

अक्लिष्टकारिणम् (akliṣṭakāriṇam) - Arjuna, who is a tireless performer of deeds (one who performs deeds effortlessly, tireless doer)

(adjective)

Accusative, masculine, singular of akliṣṭakārin

akliṣṭakārin - one who performs deeds effortlessly, tireless doer, unwearied worker

Compound type : bahuvrihi (a+kliṣṭa+kārin)

• a – not, non-, un-
  indeclinable
• kliṣṭa – troubled, weary, distressed
  adjective (masculine)
  Past Passive Participle
  From root √kliś (to trouble, to distress)
  Root: kliś (class 4)
• kārin – doing, making, performing, doer
  adjective (masculine)
  Derived from root √kṛ (to do, to make) + -in (agent suffix)
  Root: kṛ (class 8)

Note: An epithet for Arjuna.

सान्त्वयन् (sāntvayan) - comforting, placating, consoling

(adjective)

Nominative, masculine, singular of sāntvayat

sāntvayat - comforting, placating, consoling

Present Active Participle

From root √sāntv (to console, to comfort), Class 10

Root: sāntv (class 10)

श्लक्ष्णया (ślakṣṇayā) - with gentle words (with gentle, with soft, with smooth)

(adjective)

Instrumental, feminine, singular of ślakṣṇa

ślakṣṇa - smooth, soft, gentle, delicate

वाचा (vācā) - by speech, with words, by voice

(noun)

Instrumental, feminine, singular of vāc

vāc - speech, word, voice, language

मेघदुन्दुभिनिस्वनः (meghadundubhinisvanaḥ) - Indra, whose voice is like thunder and a war-drum (whose sound is like thunder and a war-drum)

(adjective)

Nominative, masculine, singular of meghadundubhinisvana

meghadundubhinisvana - having the sound of a thundercloud and a war-drum

Compound type : bahuvrihi (megha+dundubhi+nisvana)

• megha – cloud, thundercloud
  noun (masculine)
• dundubhi – drum, war-drum
  noun (masculine)
• nisvana – sound, noise, roar
  noun (masculine)
  From ni + √svan (to sound)
  Prefix: ni
  Root: svan (class 1)

Note: An epithet for Indra.