योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-31, verse-30

दैत्यदोर्दण्डपरशोस्तस्य वीर्येण वीर्यवान् ।
दानवान्बाधते शक्रो बालकानिव मर्कटः ॥ ३० ॥

daityadordaṇḍaparaśostasya vīryeṇa vīryavān ,
dānavānbādhate śakro bālakāniva markaṭaḥ 30

30. daityadordaṇḍaparaśoḥ tasya vīryeṇa vīryavān
dānavān bādhate śakraḥ bālakān iva markaṭaḥ

30. tasya daityadordaṇḍaparaśoḥ vīryeṇa vīryavān
śakraḥ markaṭaḥ bālakān iva dānavān bādhate

30. By the power of that one [Madhusūdana], who is like an axe to the mace-like arms of the demons, valorous Indra (Śakra) harasses the Dānavas (dānavān) just as a monkey harasses children.

Words meanings summery:

• दैत्यदोर्दण्डपरशोः (daityadordaṇḍaparaśoḥ) - Of Madhusūdana (Vishnu/Krishna) (of him who is an axe to the mace-like arms of the demons)

• तस्य (tasya) - of Madhusūdana (of him, by him)

• वीर्येण (vīryeṇa) - by valor, by power, by energy

• वीर्यवान् (vīryavān) - valorous, powerful, strong

• दानवान् (dānavān) - Dānavas (a class of demons)

• बाधते (bādhate) - harasses, oppresses, torments

• शक्रः (śakraḥ) - Indra, king of gods (Indra (epithet for a powerful one))

• बालकान् (bālakān) - children, young ones

• इव (iva) - like, as

• मर्कटः (markaṭaḥ) - monkey

Words meanings and morphology

दैत्यदोर्दण्डपरशोः (daityadordaṇḍaparaśoḥ) - Of Madhusūdana (Vishnu/Krishna) (of him who is an axe to the mace-like arms of the demons)

(noun)

Genitive, masculine, singular of daityadordaṇḍaparaśu

daityadordaṇḍaparaśu - one for whom the axe is like the arms of demons (a Bahuvrihi for Vishnu)

Bahuvrihi compound

Compound type : bahuvrīhi (daitya+dor-daṇḍa+paraśu)

• daitya – demon, descendant of Diti
  noun (masculine)
• dor-daṇḍa – arm-rod, mace-like arm
  noun (masculine)
  compound
• paraśu – axe, hatchet
  noun (masculine)

तस्य (tasya) - of Madhusūdana (of him, by him)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

Note: Also can be dative. Here genitive is more appropriate to modify `vīryeṇa`.

वीर्येण (vīryeṇa) - by valor, by power, by energy

(noun)

Instrumental, neuter, singular of vīrya

vīrya - valor, strength, energy, power, semen

Root: vīr (class 1)

वीर्यवान् (vīryavān) - valorous, powerful, strong

(adjective)

Nominative, masculine, singular of vīryavat

vīryavat - valorous, strong, powerful

Possessive adjective with suffix -vat

दानवान् (dānavān) - Dānavas (a class of demons)

(noun)

Accusative, masculine, plural of dānava

dānava - demon, son of Danu

patronymic from Danu

बाधते (bādhate) - harasses, oppresses, torments

(verb)

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

Present Middle

Root 1, Ātmanepada

Root: bādh (class 1)

शक्रः (śakraḥ) - Indra, king of gods (Indra (epithet for a powerful one))

(proper noun)

Nominative, masculine, singular of śakra

śakra - powerful, mighty, name of Indra

From root śak (to be able, powerful)

Root: śak (class 5)

बालकान् (bālakān) - children, young ones

(noun)

Accusative, masculine, plural of bālaka

bālaka - child, boy, young one

इव (iva) - like, as

(indeclinable)

मर्कटः (markaṭaḥ) - monkey

(noun)

Nominative, masculine, singular of markaṭa

markaṭa - monkey, ape