महाभारतः mahābhārataḥ - book-12, chapter-220, verse-14

दैत्य न व्यथसे शौर्यादथ वा वृद्धसेवया ।
तपसा भावितत्वाद्वा सर्वथैतत्सुदुष्करम् ॥१४॥

14. daitya na vyathase śauryādatha vā vṛddhasevayā ,
tapasā bhāvitatvādvā sarvathaitatsuduṣkaram.

14. daitya na vyathase śauryāt atha vā vṛddhasevayā
tapasā bhāvitātvāt vā sarvathā etat sudhuṣkaram

14. daitya śauryāt atha vā vṛddhasevayā vā tapasā
bhāvitātvāt na vyathase etat sarvathā sudhuṣkaram

14. O demon, you are not disturbed, whether due to valor, or due to service to elders, or due to having been purified by asceticism (tapas). In any case, this (your composure) is extremely difficult (to maintain).

Words meanings summery:

• दैत्य (daitya) - O demon, O son of Diti

• न (na) - not, no

• व्यथसे (vyathase) - you are disturbed, you tremble, you are agitated

• शौर्यात् (śauryāt) - from valor, due to bravery, by heroism

• अथ (atha) - used here as part of 'atha vā' meaning 'or else' (then, now, or)

• वा (vā) - or, either

• वृद्धसेवया (vṛddhasevayā) - by serving elders, through service to the old

• तपसा (tapasā) - by asceticism (tapas), by penance

• भावितात्वात् (bhāvitātvāt) - due to the state of having been refined/cultivated/purified

• वा (vā) - or, either

• सर्वथा (sarvathā) - in every way, by all means, completely

• एतत् (etat) - this (your composure or state) (this)

• सुधुष्करम् (sudhuṣkaram) - very difficult to do/achieve

Words meanings and morphology

दैत्य (daitya) - O demon, O son of Diti

(noun)

Vocative, masculine, singular of daitya

daitya - demon, son of Diti (a class of mythological beings)

न (na) - not, no

(indeclinable)

व्यथसे (vyathase) - you are disturbed, you tremble, you are agitated

(verb)

2nd person , singular, middle, Present (Laṭ) of vyath

Root: vyath (class 1)

शौर्यात् (śauryāt) - from valor, due to bravery, by heroism

(noun)

Ablative, neuter, singular of śaurya

śaurya - valor, heroism, bravery, prowess

अथ (atha) - used here as part of 'atha vā' meaning 'or else' (then, now, or)

(indeclinable)

वा (vā) - or, either

(indeclinable)

वृद्धसेवया (vṛddhasevayā) - by serving elders, through service to the old

(noun)

Instrumental, feminine, singular of vṛddhasevā

vṛddhasevā - service to elders, attendance on the old

Compound type : ṣaṣṭhī-tatpuruṣa (vṛddha+sevā)

• vṛddha – old, aged, grown, wise
  participle/adjective
  Past Passive Participle
  Derived from root vṛdh.
  Root: vṛdh (class 1)
• sevā – service, worship, devotion, attendance
  noun (feminine)

तपसा (tapasā) - by asceticism (tapas), by penance

(noun)

Instrumental, neuter, singular of tapas

tapas - asceticism, penance, spiritual fervor, heat (tapas)

भावितात्वात् (bhāvitātvāt) - due to the state of having been refined/cultivated/purified

(noun)

Ablative, neuter, singular of bhāvitātva

bhāvitātva - the state of being developed, cultivated, purified, or imbued

Compound type : tatpuruṣa (bhāvita+tva)

• bhāvita – cultivated, developed, infused, made manifest, purified
  participle
  Past Passive Participle (causative of bhū)
  Derived from the causative stem of root bhū with kta suffix.
  Root: bhū (class 1)
• tva – suffix forming abstract nouns, 'ness', 'hood'
  suffix (nominalizer) (neuter)

वा (vā) - or, either

(indeclinable)

सर्वथा (sarvathā) - in every way, by all means, completely

(indeclinable)

एतत् (etat) - this (your composure or state) (this)

(pronoun)

Nominative, neuter, singular of etad

etad - this, that

सुधुष्करम् (sudhuṣkaram) - very difficult to do/achieve

(adjective)

Nominative, neuter, singular of sudhuṣkara

sudhuṣkara - very difficult to do, extremely arduous, hard to accomplish

Compound type : karmadhāraya (su+duṣkara)

• su – good, well, very, excellent
  prefix/indeclinable
• duṣkara – difficult to do, arduous, hard to accomplish
  adjective
  From duṣ- (bad/difficult) + kṛ (to do) + khaL (kṛt suffix).
  Prefix: dus
  Root: kṛ (class 8)