योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-61, verse-13

प्रजानाशप्रतीकारेष्वसमर्थो विरागवान् ।
जगाम विपिने कर्तुं तपोऽजिनमुनीन्द्रवत् ॥ १३ ॥

prajānāśapratīkāreṣvasamartho virāgavān ,
jagāma vipine kartuṃ tapo'jinamunīndravat 13

13. prajānāśapratīkāreṣu asamarthaḥ virāgavān |
jagāma vipine kartum tapas ajinamunīndravat ||

13. prajānāśapratīkāreṣu asamarthaḥ virāgavān (saḥ)
ajinamunīndravat tapas kartum vipine jagāma

13. Being incapable of remedial actions for the destruction of his subjects, and filled with detachment (virāgavat), he went to the forest to perform austerities (tapas), just like Ajina, the foremost among sages (munīndra).

Words meanings summery:

• प्रजानाशप्रतीकारेषु (prajānāśapratīkāreṣu) - in devising or implementing solutions for the mass death of his subjects (in the remedies/countermeasures for the destruction of the people)

• असमर्थः (asamarthaḥ) - incapable, unable, powerless

• विरागवान् (virāgavān) - detached, dispassionate, unattached

• जगाम (jagāma) - he went, he proceeded

• विपिने (vipine) - in the forest, in the thicket

• कर्तुम् (kartum) - to perform penance (tapas) (to do, to perform)

• तपस् (tapas) - spiritual discipline involving self-restraint and meditation (penance, austerity, spiritual practice)

• अजिनमुनीन्द्रवत् (ajinamunīndravat) - like Ajina, the king of ascetics

Words meanings and morphology

प्रजानाशप्रतीकारेषु (prajānāśapratīkāreṣu) - in devising or implementing solutions for the mass death of his subjects (in the remedies/countermeasures for the destruction of the people)

(noun)

Locative, masculine, plural of prajānāśapratīkāra

prajānāśapratīkāra - remedy/countermeasure (pratīkāra) for the destruction (nāśa) of the people (prajā)

Compound type : tatpuruṣa (prajā+nāśa+pratīkāra)

• prajā – people, subjects, offspring
  noun (feminine)
• nāśa – destruction, ruin, loss, disappearance
  noun (masculine)
  From root naś (to perish).
  Root: naś (class 4)
• pratīkāra – remedy, countermeasure, requital, revenge
  noun (masculine)
  Derived from prati-kṛ (to act against).
  Prefix: prati
  Root: kṛ (class 8)

असमर्थः (asamarthaḥ) - incapable, unable, powerless

(adjective)

Nominative, masculine, singular of asamartha

asamartha - incapable, unable, powerless, unfit

Negative prefix 'a-' + 'samartha' (capable).

Compound type : nañ-tatpuruṣa (a+samartha)

• a – not, non-, un-
  indeclinable
  Negative prefix.
• samartha – able, capable, competent, suitable
  adjective (masculine)
  From sam-artha (having power/meaning).
  Prefix: sam

विरागवान् (virāgavān) - detached, dispassionate, unattached

(adjective)

Nominative, masculine, singular of virāgavat

virāgavat - having detachment (virāga), dispassionate, unattached

Possessive suffix '-vat' to virāga (detachment).

जगाम (jagāma) - he went, he proceeded

(verb)

3rd person , singular, active, past perfect (liṭ) of gam

Perfect 3rd singular

Reduplicated root gam.

Root: gam (class 1)

विपिने (vipine) - in the forest, in the thicket

(noun)

Locative, neuter, singular of vipina

vipina - forest, thicket, grove

कर्तुम् (kartum) - to perform penance (tapas) (to do, to perform)

(indeclinable)

Infinitive

Formed with suffix '-tum'.

Root: kṛ (class 8)

तपस् (tapas) - spiritual discipline involving self-restraint and meditation (penance, austerity, spiritual practice)

(noun)

Accusative, neuter, singular of tapas

tapas - heat, pain, penance, austerity, religious mortification, spiritual practice

From root tap (to heat, suffer).

Root: tap (class 1)

Note: Object of 'kartum'.

अजिनमुनीन्द्रवत् (ajinamunīndravat) - like Ajina, the king of ascetics

(indeclinable)

Possessive suffix '-vat' indicating 'like' or 'as' attached to the compound 'ajinamunīndra'.

Compound type : bahuvrīhi (ajina+muni+indra+vat)

• ajina – Ajina (a proper name of a sage or king)
  proper noun (masculine)
• muni – sage, ascetic, holy man
  noun (masculine)
  From root man (to think).
  Root: man (class 4)
• indra – chief, lord, best; Indra (the god)
  noun (masculine)
• vat – like, as, in the manner of
  indeclinable
  Suffix indicating similarity.