महाभारतः mahābhārataḥ - book-7, chapter-124, verse-5

न तेषां दुष्करं किंचित्त्रिषु लोकेषु विद्यते ।
सर्वलोकगुरुर्येषां त्वं नाथो मधुसूदन ॥५॥

5. na teṣāṁ duṣkaraṁ kiṁcittriṣu lokeṣu vidyate ,
sarvalokagururyeṣāṁ tvaṁ nātho madhusūdana.

5. na teṣāṃ duṣkaraṃ kiṃcit triṣu lokeṣu vidyate
sarvalokaguruḥ yeṣāṃ tvaṃ nāthaḥ madhusūdana

5. madhusūdana (he) yeṣāṃ tvaṃ sarvalokaguruḥ nāthaḥ (asi),
teṣāṃ triṣu lokeṣu kiṃcit duṣkaraṃ na vidyate

5. For them, nothing is difficult to accomplish in the three worlds, O Madhusūdana (Kṛṣṇa), because you are their protector and the preceptor (guru) of all worlds.

Words meanings summery:

• न (na) - not (not, no)

• तेषां (teṣāṁ) - for them (i.e., the Pāṇḍavas) (of them, for them)

• दुष्करं (duṣkaraṁ) - difficult to accomplish (difficult to do, hard to accomplish, impossible)

• किंचित् (kiṁcit) - anything (anything, something)

• त्रिषु (triṣu) - in the three (in three)

• लोकेषु (lokeṣu) - in the worlds (in the worlds, in realms)

• विद्यते (vidyate) - exists, is found (it exists, it is found, it is present)

• सर्वलोकगुरुः (sarvalokaguruḥ) - preceptor (guru) of all worlds (preceptor of all worlds, teacher of all beings)

• येषां (yeṣāṁ) - whose (referring to the Pāṇḍavas, `teṣāṃ`) (whose, of whom)

• त्वं (tvaṁ) - you (Kṛṣṇa) (you)

• नाथः (nāthaḥ) - protector (lord, protector, master)

• मधुसूदन (madhusūdana) - O Madhusūdana (Kṛṣṇa) (O Slayer of Madhu (Kṛṣṇa))

Words meanings and morphology

न (na) - not (not, no)

(indeclinable)

Negative particle.

तेषां (teṣāṁ) - for them (i.e., the Pāṇḍavas) (of them, for them)

(pronoun)

Genitive, masculine, plural of tad

tad - that, those

Genitive plural of `tad` (masculine/neuter).

Note: Possessive or dative in sense.

दुष्करं (duṣkaraṁ) - difficult to accomplish (difficult to do, hard to accomplish, impossible)

(adjective)

Nominative, neuter, singular of duṣkara

duṣkara - difficult to do, hard to perform, arduous, impossible

Compound of `dus` (bad, difficult) and `kara` (doing, making).

Compound type : Upapada Tatpuruṣa (dus+kara)

• dus – bad, ill, difficult
  indeclinable
• kara – making, doing, performing, doer
  noun (masculine)
  From root `kṛ`.
  Root: kṛ (class 8)

Note: Predicate adjective.

किंचित् (kiṁcit) - anything (anything, something)

(pronoun)

Nominative, neuter, singular of kiṃcid

kiṁcid - something, anything, a little, a certain

Compound of `kim` (what) and `cit` (an indeclinable particle).

Compound type : Avyayībhāva (kim+cit)

• kim – what, who
  pronoun
• cit – even, also, indeed (emphasizing particle)
  indeclinable

त्रिषु (triṣu) - in the three (in three)

(numeral)

लोकेषु (lokeṣu) - in the worlds (in the worlds, in realms)

(noun)

Locative, masculine, plural of loka

loka - world, realm, universe, people

Root: lok (class 10)

Note: Refers to the 'three worlds' (heaven, earth, netherworld or similar cosmological division).

विद्यते (vidyate) - exists, is found (it exists, it is found, it is present)

(verb)

3rd person , singular, middle, present (laṭ) of vid

Present tense, middle voice, 3rd person singular

From root `vid` (4th class, `vidyate` 'to be').

Root: vid (class 4)

सर्वलोकगुरुः (sarvalokaguruḥ) - preceptor (guru) of all worlds (preceptor of all worlds, teacher of all beings)

(noun)

Nominative, masculine, singular of sarvalokaguru

sarvalokaguru - teacher/preceptor (guru) of all worlds, universal teacher

Tatpuruṣa compound (sarveṣāṃ lokānāṃ guruḥ).

Compound type : Tatpuruṣa (sarva+loka+guru)

• sarva – all, every
  adjective
• loka – world, realm, people
  noun (masculine)
  Root: lok (class 10)
• guru – teacher, preceptor, heavy, important (guru)
  noun (masculine)

Note: Predicate nominative for `tvaṃ`.

येषां (yeṣāṁ) - whose (referring to the Pāṇḍavas, `teṣāṃ`) (whose, of whom)

(pronoun)

Genitive, masculine, plural of yad

yad - who, which, what

Genitive plural of `yad` (masculine/neuter).

Note: Relates to the implicit 'they' for whom things are not difficult.

त्वं (tvaṁ) - you (Kṛṣṇa) (you)

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you

Nominative singular of `yuṣmad`.

Note: Refers to Kṛṣṇa.

नाथः (nāthaḥ) - protector (lord, protector, master)

(noun)

Nominative, masculine, singular of nātha

nātha - lord, master, protector, helper

Root: nāth (class 1)

मधुसूदन (madhusūdana) - O Madhusūdana (Kṛṣṇa) (O Slayer of Madhu (Kṛṣṇa))

(proper noun)

Vocative, masculine, singular of madhusūdana

madhusūdana - Slayer of the demon Madhu, an epithet of Viṣṇu/Kṛṣṇa

Upapada Tatpuruṣa compound.

Compound type : Upapada Tatpuruṣa (madhu+sūdana)

• madhu – Madhu (a demon), honey, sweet
  noun (masculine)
• sūdana – slayer, destroyer
  noun (masculine)
  Derived from root `sūd` (to destroy, kill).
  Root: sūd (class 10)

Note: Addressed to Kṛṣṇa.