महाभारतः mahābhārataḥ - book-1, chapter-114, verse-17

इन्द्रो हि राजा देवानां प्रधान इति नः श्रुतम् ।
अप्रमेयबलोत्साहो वीर्यवानमितद्युतिः ॥१७॥

17. indro hi rājā devānāṁ pradhāna iti naḥ śrutam ,
aprameyabalotsāho vīryavānamitadyutiḥ.

17. indraḥ hi rājā devānām pradhānaḥ iti naḥ
śrutam aprameyabalotsāhaḥ vīryavān amitadyutiḥ

17. Indeed, Indra is the king of the gods (deva), the foremost (pradhāna), as we have heard. He possesses immeasurable strength and enthusiasm, is valiant, and radiates boundless splendor.

Words meanings summery:

• इन्द्रः (indraḥ) - Indra, chief of the gods (Indra)

• हि (hi) - indeed, surely

• राजा (rājā) - king

• देवानाम् (devānām) - of the gods

• प्रधानः (pradhānaḥ) - chief, principal, foremost

• इति (iti) - thus, so (marks reported speech)

• नः (naḥ) - by us, to us

• श्रुतम् (śrutam) - heard

• अप्रमेयबलोत्साहः (aprameyabalotsāhaḥ) - whose strength and enthusiasm are immeasurable

• वीर्यवान् (vīryavān) - valiant, powerful, energetic

• अमितद्युतिः (amitadyutiḥ) - of immeasurable splendor, having endless brilliance

Words meanings and morphology

इन्द्रः (indraḥ) - Indra, chief of the gods (Indra)

(proper noun)

Nominative, masculine, singular of indra

indra - Indra, king of the gods

हि (hi) - indeed, surely

(indeclinable)

राजा (rājā) - king

(noun)

Nominative, masculine, singular of rājan

rājan - king, ruler

देवानाम् (devānām) - of the gods

(noun)

Genitive, masculine, plural of deva

deva - god, deity

प्रधानः (pradhānaḥ) - chief, principal, foremost

(adjective)

Nominative, masculine, singular of pradhāna

pradhāna - chief, principal, foremost (pradhāna)

इति (iti) - thus, so (marks reported speech)

(indeclinable)

नः (naḥ) - by us, to us

(pronoun)

Instrumental, plural of asmad

asmad - we, us

Note: Enclitic form, used here as agent with passive participle śrutam

श्रुतम् (śrutam) - heard

(adjective)

Nominative, neuter, singular of śruta

śruta - heard, listened

Past Passive Participle

root śru + kta

Root: śru (class 5)

अप्रमेयबलोत्साहः (aprameyabalotsāhaḥ) - whose strength and enthusiasm are immeasurable

(adjective)

Nominative, masculine, singular of aprameyabalotsāha

aprameyabalotsāha - one whose strength and enthusiasm are immeasurable

Compound type : bahuvrihi (a+prameya+bala+utsāha)

• a – not, un-
  indeclinable
  negative prefix
• prameya – measurable, knowable
  adjective (masculine)
  Gerundive
  root mā + yat with prefix pra
  Prefix: pra
  Root: mā (class 2)
• bala – strength, power
  noun (neuter)
• utsāha – enthusiasm, energy
  noun (masculine)
  Prefix: ud
  Root: sah (class 1)

वीर्यवान् (vīryavān) - valiant, powerful, energetic

(adjective)

Nominative, masculine, singular of vīryavat

vīryavat - valiant, powerful, energetic

possessive suffix -vat

अमितद्युतिः (amitadyutiḥ) - of immeasurable splendor, having endless brilliance

(adjective)

Nominative, masculine, singular of amitadyuti

amitadyuti - of immeasurable splendor

Compound type : bahuvrihi (amita+dyuti)

• amita – immeasurable, infinite
  adjective (masculine)
  Past Passive Participle
  root mā + kta with negative prefix a
  Prefix: a
  Root: mā (class 2)
• dyuti – splendor, brilliance, light
  noun (feminine)
  Root: dyut (class 1)