योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-56, verse-9

द्वावेतौ राम सुखितावन्तश्चेत्परिशीतलौ ।
अन्तःशीतलता या स्यात्तदनन्ततपःफलम् ॥ ९ ॥

dvāvetau rāma sukhitāvantaścetpariśītalau ,
antaḥśītalatā yā syāttadanantatapaḥphalam 9

9. dvāu etau rāma sukhitāu antaḥ cet pariśītalāu
antaḥśītalatā yā syāt tat anantatapaḥphalam

9. rāma cet etau dvāu antaḥ pariśītalāu (staḥ) (tarhi) sukhitāu
(staḥ) yā antaḥśītalatā syāt tat anantatapaḥphalam (asti)

9. O Rāma, these two types of people are happy if they are inwardly supremely serene. That inner serenity is indeed the fruit of infinite austerity (tapas).

Words meanings summery:

• द्वाउ (dvāu) - two

• एतौ (etau) - these two

• राम (rāma) - O Rāma

• सुखिताउ (sukhitāu) - happy, contented

• अन्तः (antaḥ) - inwardly, inside

• चेत् (cet) - if

• परिशीतलाउ (pariśītalāu) - very cool, supremely serene

• अन्तःशीतलता (antaḥśītalatā) - inner coolness, inner serenity

• या (yā) - which, that which

• स्यात् (syāt) - may be, should be, let it be

• तत् (tat) - that, therefore

• अनन्ततपःफलम् (anantatapaḥphalam) - fruit of infinite austerity

Words meanings and morphology

द्वाउ (dvāu) - two

(numeral)

एतौ (etau) - these two

(pronoun)

Nominative, masculine, dual of etad

etad - this, these

राम (rāma) - O Rāma

(proper noun)

Vocative, masculine, singular of rāma

rāma - Rāma (a proper name), pleasant, charming

सुखिताउ (sukhitāu) - happy, contented

(adjective)

Nominative, masculine, dual of sukhitā

sukhitā - happy, delighted, contented, comfortable

Derived from 'sukha' (happiness) with suffix '-ita'.

अन्तः (antaḥ) - inwardly, inside

(indeclinable)

चेत् (cet) - if

(indeclinable)

परिशीतलाउ (pariśītalāu) - very cool, supremely serene

(adjective)

Nominative, masculine, dual of pariśītala

pariśītala - very cool, very cold, very calm or serene

Compound type : karmadhāraya (pari+śītala)

• pari – around, about, thoroughly, very
  indeclinable
• śītala – cool, cold, calm, tranquil, serene
  adjective (masculine)

अन्तःशीतलता (antaḥśītalatā) - inner coolness, inner serenity

(noun)

Nominative, feminine, singular of antaḥśītalatā

antaḥśītalatā - inner coolness, inner tranquility, inner serenity

Compound type : karmadhāraya (antas+śītalatā)

• antas – inside, inner, within
  indeclinable
• śītalatā – coolness, coldness, serenity, tranquility
  noun (feminine)
  Derived from 'śītala' (cool) with suffix '-tā'.

या (yā) - which, that which

(pronoun)

Nominative, feminine, singular of yad

yad - which, what, that

स्यात् (syāt) - may be, should be, let it be

(verb)

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

Optative Mood

Root 'as' (class 2) in optative mood, 3rd person singular.

Root: as (class 2)

तत् (tat) - that, therefore

(pronoun)

Nominative, neuter, singular of tad

tad - that, this, it

अनन्ततपःफलम् (anantatapaḥphalam) - fruit of infinite austerity

(noun)

Nominative, neuter, singular of anantatapaḥphala

anantatapaḥphala - the fruit or result of endless austerity (tapas)

Compound type : tatpuruṣa (ananta+tapas+phala)

• ananta – infinite, endless, boundless
  adjective (masculine)
  Negation of 'anta' (end) with 'an'.
• tapas – austerity, penance, spiritual heat, self-discipline
  noun (neuter)
  Root: tap (class 1)
• phala – fruit, result, consequence
  noun (neuter)