महाभारतः mahābhārataḥ - book-3, chapter-202, verse-18

एष योगविधिः कृत्स्नो यावदिन्द्रियधारणम् ।
एतन्मूलं हि तपसः कृत्स्नस्य नरकस्य च ॥१८॥

18. eṣa yogavidhiḥ kṛtsno yāvadindriyadhāraṇam ,
etanmūlaṁ hi tapasaḥ kṛtsnasya narakasya ca.

18. eṣaḥ yogavidhiḥ kṛtsnaḥ yāvat indriyadhāraṇam
etat mūlam hi tapasaḥ kṛtsnasya narakasya ca

18. This entire method of yoga (yoga) is essentially the control of the senses (indriyadhāraṇam). Indeed, this (principle of sense control) is the root of all asceticism (tapas) and also the root of all hell (naraka).

Words meanings summery:

• एषः (eṣaḥ) - this, this one

• योगविधिः (yogavidhiḥ) - method of yoga (yoga) (method of yoga, rule of yoga)

• कृत्स्नः (kṛtsnaḥ) - entire, whole, complete

• यावत् (yāvat) - extends as far as (as long as, as far as, to the extent that)

• इन्द्रियधारणम् (indriyadhāraṇam) - control of the senses, restraint of the senses

• एतत् (etat) - this (principle of sense control) (this)

• मूलम् (mūlam) - root, origin, foundation

• हि (hi) - indeed, surely, for

• तपसः (tapasaḥ) - of asceticism (tapas) (of asceticism, of austerity)

• कृत्स्नस्य (kṛtsnasya) - of the entire, of all

• नरकस्य (narakasya) - of all hell (naraka) (of hell, of the infernal region)

• च (ca) - and, also

Words meanings and morphology

एषः (eṣaḥ) - this, this one

(pronoun)

Nominative, masculine, singular of etas

etas - this, this one (demonstrative pronoun)

योगविधिः (yogavidhiḥ) - method of yoga (yoga) (method of yoga, rule of yoga)

(noun)

Nominative, masculine, singular of yogavidhi

yogavidhi - method of yoga, rule of yoga, yoga practice

Compound type : tatpurusha (yoga+vidhi)

• yoga – union, spiritual discipline, method, contemplation (yoga)
  noun (masculine)
  derived from root yuj-
  Root: yuj (class 7)
• vidhi – rule, method, injunction, ordinance
  noun (masculine)
  derived from root dhā- with prefix vi-
  Prefix: vi
  Root: dhā (class 3)

कृत्स्नः (kṛtsnaḥ) - entire, whole, complete

(adjective)

Nominative, masculine, singular of kṛtsna

kṛtsna - entire, whole, complete, all

यावत् (yāvat) - extends as far as (as long as, as far as, to the extent that)

(indeclinable)

इन्द्रियधारणम् (indriyadhāraṇam) - control of the senses, restraint of the senses

(noun)

Nominative, neuter, singular of indriyadhāraṇa

indriyadhāraṇa - control of the senses, restraint of the senses

Compound type : tatpurusha (indriya+dhāraṇa)

• indriya – sense organ, faculty of sense
  noun (neuter)
• dhāraṇa – holding, bearing, retaining, control, restraint
  noun (neuter)
  derived from root dhṛ-
  Root: dhṛ (class 1)

एतत् (etat) - this (principle of sense control) (this)

(pronoun)

Nominative, neuter, singular of etas

etas - this, this one (demonstrative pronoun)

मूलम् (mūlam) - root, origin, foundation

(noun)

Nominative, neuter, singular of mūla

mūla - root, origin, foundation, basis

हि (hi) - indeed, surely, for

(indeclinable)

तपसः (tapasaḥ) - of asceticism (tapas) (of asceticism, of austerity)

(noun)

Genitive, neuter, singular of tapas

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

Root: tap (class 1)

कृत्स्नस्य (kṛtsnasya) - of the entire, of all

(adjective)

Genitive, neuter, singular of kṛtsna

kṛtsna - entire, whole, complete, all

Note: Agrees with narakasya.

नरकस्य (narakasya) - of all hell (naraka) (of hell, of the infernal region)

(noun)

Genitive, masculine, singular of naraka

naraka - hell, infernal region (naraka)

च (ca) - and, also

(indeclinable)