महाभारतः mahābhārataḥ - book-12, chapter-82, verse-18

तच्चेत्सिध्येत्प्रयत्नेन कृत्वा कर्म सुदुष्करम् ।
महाक्षयव्ययं वा स्याद्विनाशो वा पुनर्भवेत् ॥१८॥

18. taccetsidhyetprayatnena kṛtvā karma suduṣkaram ,
mahākṣayavyayaṁ vā syādvināśo vā punarbhavet.

18. tat cet sidhyet prayatnena kṛtvā karma suduṣkaram
mahākṣayavyayam vā syāt vināśaḥ vā punaḥ bhavet

18. cet tat suduṣkaram karma kṛtvā prayatnena sidhyet
vā mahākṣayavyayam syāt vā punaḥ vināśaḥ bhavet

18. Even if that (kingdom/goal) were to be achieved through great effort, after undertaking an extremely difficult task, it would either result in enormous loss and expenditure, or lead to utter destruction (vināśa) once more.

Words meanings summery:

• तत् (tat) - that (goal, kingdom) (that, it)

• चेत् (cet) - if, supposing that

• सिध्येत् (sidhyet) - it would succeed, it would be accomplished

• प्रयत्नेन (prayatnena) - by effort, with exertion

• कृत्वा (kṛtvā) - having done, after doing/performing

• कर्म (karma) - task (karma) (action, deed, task)

• सुदुष्करम् (suduṣkaram) - very difficult, extremely hard to do

• महाक्षयव्ययम् (mahākṣayavyayam) - enormous loss and expenditure (great loss and expenditure, involving great destruction and expense)

• वा (vā) - or

• स्यात् (syāt) - it would be, it might be

• विनाशः (vināśaḥ) - utter destruction (vināśa) (destruction, ruin, disappearance)

• वा (vā) - or

• पुनः (punaḥ) - again, once more

• भवेत् (bhavet) - it would happen, it would be

Words meanings and morphology

तत् (tat) - that (goal, kingdom) (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, it, he, she

चेत् (cet) - if, supposing that

(indeclinable)

सिध्येत् (sidhyet) - it would succeed, it would be accomplished

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of sidh

Root: sidh (class 4)

प्रयत्नेन (prayatnena) - by effort, with exertion

(noun)

Instrumental, masculine, singular of prayatna

prayatna - effort, exertion, endeavor

Prefix: pra

Root: yat (class 1)

कृत्वा (kṛtvā) - having done, after doing/performing

(indeclinable)

Absolutive (Gerund)

root kṛ (to do, make) + absolutive suffix tvā

Root: kṛ (class 8)

कर्म (karma) - task (karma) (action, deed, task)

(noun)

Accusative, neuter, singular of karma

karma - action, deed, work, ritual action, fate (karma)

root kṛ (to do) + suffix man

Root: kṛ (class 8)

सुदुष्करम् (suduṣkaram) - very difficult, extremely hard to do

(adjective)

Accusative, neuter, singular of suduṣkara

suduṣkara - very difficult to do, extremely arduous

compound: su (very, well) + duṣkara (difficult to do)

Compound type : pra-ādi samāsa (su+duṣkara)

• su – good, well, very, easily
  indeclinable
• duṣkara – difficult to do, arduous
  adjective (neuter)
  compound: dus (difficult) + kṛ (to do) + a
  Prefix: dus
  Root: kṛ (class 8)

महाक्षयव्ययम् (mahākṣayavyayam) - enormous loss and expenditure (great loss and expenditure, involving great destruction and expense)

(noun)

Nominative, neuter, singular of mahākṣayavyaya

mahākṣayavyaya - great destruction and expense; great loss and expenditure

compound: mahā (great) + kṣaya (loss, destruction) + vyaya (expenditure)

Compound type : dvandva or tatpuruṣa (mahā+kṣaya+vyaya)

• mahā – great, large, mighty
  adjective
• kṣaya – loss, destruction, decline
  noun (masculine)
  root kṣi (to decay, destroy)
  Root: kṣi (class 1)
• vyaya – expenditure, expense, waste
  noun (masculine)
  prefix vi + root i (to go)
  Prefix: vi
  Root: i (class 2)

वा (vā) - or

(indeclinable)

स्यात् (syāt) - it would be, it might be

(verb)

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

Root: as (class 2)

विनाशः (vināśaḥ) - utter destruction (vināśa) (destruction, ruin, disappearance)

(noun)

Nominative, masculine, singular of vināśa

vināśa - destruction, ruin, annihilation, disappearance (vināśa)

prefix vi + root naś (to perish, destroy)

Prefix: vi

Root: naś (class 4)

वा (vā) - or

(indeclinable)

पुनः (punaḥ) - again, once more

(indeclinable)

भवेत् (bhavet) - it would happen, it would be

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of bhū

Root: bhū (class 1)