महाभारतः mahābhārataḥ - book-1, chapter-58, verse-4

त्रिःसप्तकृत्वः पृथिवीं कृत्वा निःक्षत्रियां पुरा ।
जामदग्न्यस्तपस्तेपे महेन्द्रे पर्वतोत्तमे ॥४॥

4. triḥsaptakṛtvaḥ pṛthivīṁ kṛtvā niḥkṣatriyāṁ purā ,
jāmadagnyastapastepe mahendre parvatottame.

4. triḥsaptakṛtvaḥ pṛthivīm kṛtvā niḥkṣatriyām purā
jāmadagnyaḥ tapaḥ tepe mahendre parvatottame

4. In ancient times, Paraśurāma, the son of Jamadagni, after making the earth free of Kṣatriyas twenty-one times, performed severe penance on Mahendra, the foremost of mountains.

Words meanings summery:

• त्रिःसप्तकृत्वः (triḥsaptakṛtvaḥ) - twenty-one times

• पृथिवीम् (pṛthivīm) - the earth (earth, world)

• कृत्वा (kṛtvā) - having made (having done, having made)

• निःक्षत्रियाम् (niḥkṣatriyām) - free of Kṣatriyas (without kṣatriyas, deprived of kṣatriyas)

• पुरा (purā) - in ancient times (formerly, in ancient times, before)

• जामदग्न्यः (jāmadagnyaḥ) - Paraśurāma, the son of Jamadagni (son of Jamadagni, Paraśurāma)

• तपः (tapaḥ) - penance (penance, asceticism, austerity)

• तेपे (tepe) - performed (he performed, he practiced (penance))

• महेन्द्रे (mahendre) - on Mahendra (mountain) (on Mahendra mountain)

• पर्वतोत्तमे (parvatottame) - the foremost of mountains (on the best of mountains)

Words meanings and morphology

त्रिःसप्तकृत्वः (triḥsaptakṛtvaḥ) - twenty-one times

(indeclinable)

Indeclinable formed with the suffix kṛtvasuc

Compound type : karmadhāraya (triḥsapta+kṛtva)

• triḥsapta – twenty-one
  numeral/adjective
• kṛtva – times, on occasions
  indeclinable
  Suffix kṛtvasuc

पृथिवीम् (pṛthivīm) - the earth (earth, world)

(noun)

Accusative, feminine, singular of pṛthivī

pṛthivī - earth, ground, world

Root: pṛth

कृत्वा (kṛtvā) - having made (having done, having made)

(indeclinable)

Root: kṛ (class 8)

निःक्षत्रियाम् (niḥkṣatriyām) - free of Kṣatriyas (without kṣatriyas, deprived of kṣatriyas)

(adjective)

Accusative, feminine, singular of niḥkṣatriya

niḥkṣatriya - without kṣatriyas, deprived of kṣatriyas, kṣatriya-less

Formed with negative prefix nis

Compound type : bahuvrihi (nis+kṣatriya)

• nis – out, without, free from, away
  prefix/indeclinable
• kṣatriya – a member of the warrior or ruling class, pertaining to kṣatra
  noun (masculine)
  Root: kṣi (class 5)

Note: Modifies pṛthivīm.

पुरा (purā) - in ancient times (formerly, in ancient times, before)

(indeclinable)

Note: Adverb of time.

जामदग्न्यः (jāmadagnyaḥ) - Paraśurāma, the son of Jamadagni (son of Jamadagni, Paraśurāma)

(noun)

Nominative, masculine, singular of jāmadagnya

jāmadagnya - descendant of Jamadagni, Paraśurāma

Taddhita derivation from Jamadagni + ṇya

तपः (tapaḥ) - penance (penance, asceticism, austerity)

(noun)

Accusative, neuter, singular of tapas

tapas - heat, penance, religious austerity, asceticism

From root tap (to heat, to suffer penance)

Root: tap (class 1)

Note: Object of tepe.

तेपे (tepe) - performed (he performed, he practiced (penance))

(verb)

3rd person , singular, middle, perfect (liṭ) of tap

Root: tap (class 1)

Note: Agent is jāmadagnyaḥ.

महेन्द्रे (mahendre) - on Mahendra (mountain) (on Mahendra mountain)

(noun)

Locative, masculine, singular of mahendra

mahendra - Great Indra; name of a mountain range (e.g., Eastern Ghats)

Compound type : karmadhāraya (mahā+indra)

• mahā – great, large, mighty
  adjective/prefix
• indra – Indra (Vedic deity), chief, best
  noun (masculine)

Note: Locative of place.

पर्वतोत्तमे (parvatottame) - the foremost of mountains (on the best of mountains)

(adjective)

Locative, masculine, singular of parvatottama

parvatottama - best of mountains, chief mountain

Compound type : tatpuruṣa (parvata+uttama)

• parvata – mountain, hill
  noun (masculine)
• uttama – highest, best, excellent, chief
  adjective (masculine)
  Superlative degree of 'ud' (up)
  Prefix: ud

Note: Adjective modifying mahendre.