योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-14, verse-25

बालस्य स्वमनोमोहकल्पितः प्राणहारकः ।
रात्रौ नभसि वेतालो विचारेण विलीयते ॥ २५ ॥

bālasya svamanomohakalpitaḥ prāṇahārakaḥ ,
rātrau nabhasi vetālo vicāreṇa vilīyate 25

25. bālasya svamanomohakalpitaḥ prāṇahārakaḥ |
rātrau nabhasi vetālaḥ vicāreṇa vilīyate ||

25. rātrau nabhasi bālasya svamanomohakalpitaḥ
prāṇahārakaḥ vetālaḥ vicāreṇa vilīyate

25. A life-threatening ghost (vetāla) in the night sky, imagined by a child's own mental delusion (manomoha), completely dissolves through inquiry (vicāra).

Words meanings summery:

• बालस्य (bālasya) - of a child, of a boy

• स्वमनोमोहकल्पितः (svamanomohakalpitaḥ) - imagined by one's own mental delusion

• प्राणहारकः (prāṇahārakaḥ) - life-threatening (life-stealing, destructive of life)

• रात्रौ (rātrau) - in the night

• नभसि (nabhasi) - in the sky, in the atmosphere

• वेतालः (vetālaḥ) - ghost, demon, vampire

• विचारेण (vicāreṇa) - through proper inquiry or investigation (by inquiry, through discrimination)

• विलीयते (vilīyate) - dissolves, vanishes, disappears

Words meanings and morphology

बालस्य (bālasya) - of a child, of a boy

(noun)

Genitive, masculine, singular of bāla

bāla - child, boy, young, ignorant

Note: Modifies svamanomohakalpitaḥ.

स्वमनोमोहकल्पितः (svamanomohakalpitaḥ) - imagined by one's own mental delusion

(adjective)

Nominative, masculine, singular of svamanomohakalpita

svamanomohakalpita - imagined or created by one's own mental delusion

Past Passive Participle as part of compound

kalpita is from √kḷp (to imagine, create) + kta suffix. svamanomoha (own mental delusion) + kalpita.

Compound type : tatpurusha (sva+manomoha+kalpita)

• sva – own, self
  pronoun
• manomoha – mental delusion, illusion of mind
  noun (masculine)
• kalpita – imagined, created, supposed, fabricated
  participle
  Past Passive Participle
  From root √kḷp (to imagine, create) + kta suffix.
  Root: kḷp (class 1)

Note: Qualifies vetālaḥ.

प्राणहारकः (prāṇahārakaḥ) - life-threatening (life-stealing, destructive of life)

(adjective)

Nominative, masculine, singular of prāṇahāraka

prāṇahāraka - life-stealing, taking away life, destructive of life

Agent noun/adjective

hāraka from √hṛ (to take, steal) + ṇaka suffix.

Compound type : tatpurusha (prāṇa+hāraka)

• prāṇa – breath, life, vital air
  noun (masculine)
  From √an (to breathe) with prefix pra-.
  Prefix: pra
  Root: an (class 2)
• hāraka – taking away, stealing, captivating, destroying
  adjective
  Agent noun/adjective
  From root √hṛ (to take, steal) + ṇvul/aka suffix.
  Root: hṛ (class 1)

Note: Qualifies vetālaḥ.

रात्रौ (rātrau) - in the night

(noun)

Locative, feminine, singular of rātri

rātri - night

Note: Adverbial locative.

नभसि (nabhasi) - in the sky, in the atmosphere

(noun)

Locative, neuter, singular of nabhas

nabhas - sky, atmosphere, cloud, ether

as-stem noun.

Root: nabh (class 1)

Note: Adverbial locative.

वेतालः (vetālaḥ) - ghost, demon, vampire

(noun)

Nominative, masculine, singular of vetāla

vetāla - a ghost, demon, vampire, an evil spirit (esp. one animating a corpse)

विचारेण (vicāreṇa) - through proper inquiry or investigation (by inquiry, through discrimination)

(noun)

Instrumental, masculine, singular of vicāra

vicāra - inquiry, deliberation, discrimination, reflection, investigation

From √car with prefix vi-.

Prefix: vi

Root: car (class 1)

Note: Instrument of action.

विलीयते (vilīyate) - dissolves, vanishes, disappears

(verb)

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

From root √lī (to dissolve, to cling to) in passive voice, or a deponent root. Usually class 4 lī is Atmanepadi "to melt, dissolve".

Prefix: vi

Root: lī (class 4)

Note: Intransitive verb.