योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-122, verse-10

मन्त्रविद्याबलौजोभिर्दुर्जयाः शस्त्रपाणयः ।
क्वचित्प्रमत्तैर्मकरैर्निगीर्णोद्गीर्णदेहकाः ॥ १० ॥

mantravidyābalaujobhirdurjayāḥ śastrapāṇayaḥ ,
kvacitpramattairmakarairnigīrṇodgīrṇadehakāḥ 10

10. mantravidyābalaujobhiḥ durjayāḥ śastrapāṇayaḥ
kvacit pramattaiḥ makaraiḥ nigīrṇodgīrṇadehakāḥ

10. mantravidyābalaujobhiḥ durjayāḥ śastrapāṇayaḥ
kvacit pramattaiḥ makaraiḥ nigīrṇodgīrṇadehakāḥ

10. Even those unconquerable by the power and might of their mystical incantations (mantra) and knowledge, the weapon-wielding (śastrapāṇayaḥ) warriors, sometimes had their bodies swallowed and then disgorged by frenzied sea monsters (makara).

Words meanings summery:

• मन्त्रविद्याबलौजोभिः (mantravidyābalaujobhiḥ) - by the strength and power of mantras and knowledge

• दुर्जयाः (durjayāḥ) - unconquerable, difficult to overcome

• शस्त्रपाणयः (śastrapāṇayaḥ) - weapon-wielding, holding weapons in hand

• क्वचित् (kvacit) - sometimes, in some places, somewhere

• प्रमत्तैः (pramattaiḥ) - by frenzied (sea monsters) (by furious ones, by intoxicated ones, by careless ones)

• मकरैः (makaraiḥ) - by sea monsters, by crocodiles

• निगीर्णोद्गीर्णदेहकाः (nigīrṇodgīrṇadehakāḥ) - whose bodies were swallowed and disgorged

Words meanings and morphology

मन्त्रविद्याबलौजोभिः (mantravidyābalaujobhiḥ) - by the strength and power of mantras and knowledge

(noun)

Instrumental, neuter, plural of mantravidyābalaujas

mantravidyābalaujas - the strength and power of mystical incantations (mantra) and knowledge

Compound type : dvandva / tatpuruṣa (mantra+vidyā+bala+ojas)

• mantra – mystical incantation, sacred utterance, spell
  noun (masculine)
• vidyā – knowledge, learning, science
  noun (feminine)
• bala – strength, power, force
  noun (neuter)
• ojas – vital energy, power, vigor, might
  noun (neuter)

Note: Refers to the means by which they were considered unconquerable.

दुर्जयाः (durjayāḥ) - unconquerable, difficult to overcome

(adjective)

Nominative, masculine, plural of durjaya

durjaya - difficult to conquer, unconquerable

Gerundive/Future Passive Participle

Derived from root ji with prefix dur

Compound type : prādi-samāsa (dur+jaya)

• dur – difficult, bad, hard
  indeclinable
• jaya – conquest, victory
  noun (masculine)
  Root: ji (class 1)

Note: Describes the warriors.

शस्त्रपाणयः (śastrapāṇayaḥ) - weapon-wielding, holding weapons in hand

(adjective)

Nominative, masculine, plural of śastrapāṇi

śastrapāṇi - weapon in hand, armed with weapons

Compound type : bahuvrīhi (śastra+pāṇi)

• śastra – weapon, sword
  noun (neuter)
• pāṇi – hand
  noun (masculine)

Note: Describes the warriors.

क्वचित् (kvacit) - sometimes, in some places, somewhere

(indeclinable)

प्रमत्तैः (pramattaiḥ) - by frenzied (sea monsters) (by furious ones, by intoxicated ones, by careless ones)

(adjective)

Instrumental, masculine, plural of pramatta

pramatta - intoxicated, furious, frenzied, careless

Past Passive Participle

Derived from root mad with prefix pra

Prefix: pra

Root: mad (class 4)

Note: Describes the sea monsters (makaraiḥ).

मकरैः (makaraiḥ) - by sea monsters, by crocodiles

(noun)

Instrumental, masculine, plural of makara

makara - sea monster, crocodile, a mythical aquatic creature

निगीर्णोद्गीर्णदेहकाः (nigīrṇodgīrṇadehakāḥ) - whose bodies were swallowed and disgorged

(adjective)

Nominative, masculine, plural of nigīrṇodgīrṇadehaka

nigīrṇodgīrṇadehaka - whose bodies have been swallowed and disgorged

Compound type : bahuvrīhi (nigīrṇa+udgīrṇa+dehaka)

• nigīrṇa – swallowed
  adjective (masculine)
  Past Passive Participle
  Derived from root gṛ with prefix ni
  Prefix: ni
  Root: gṛ (class 6)
• udgīrṇa – disgorged, vomited
  adjective (masculine)
  Past Passive Participle
  Derived from root gṛ with prefix ud
  Prefix: ud
  Root: gṛ (class 6)
• dehaka – body (diminutive/pejorative, or simply referring to the body)
  noun (masculine)
  Suffix -ka often used for diminutive or contempt, or simply a common variant.

Note: Describes the warriors.