योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-124, verse-18

शाकद्वीपेऽस्तशैलस्य शिरस्यभ्रगुहागृहे ।
पिशाचाप्सरसा मासं पाश्चात्यः कामुकीकृतः ॥ १८ ॥

śākadvīpe'staśailasya śirasyabhraguhāgṛhe ,
piśācāpsarasā māsaṃ pāścātyaḥ kāmukīkṛtaḥ 18

18. śākadvīpe astaśailasya śirasi abhraguhāgṛhe
piśāca apsarasā māsam pāścātyaḥ kāmukīkṛtaḥ

18. śākadvīpe astaśailasya śirasi abhraguhāgṛhe
pāścātyaḥ piśāca apsarasā māsam kāmukīkṛtaḥ

18. In Śākadvīpa, on the summit of Astaśaila (the setting mountain), within a cloud-cave dwelling, a westerner was made passionate by a female piśāca for a month.

Words meanings summery:

• शाकद्वीपे (śākadvīpe) - in Śākadvīpa

• अस्तशैलस्य (astaśailasya) - of Asta mountain (of the setting mountain)

• शिरसि (śirasi) - on the summit (of the mountain) (on the head, on the summit)

• अभ्रगुहागृहे (abhraguhāgṛhe) - in a cloud-cave house/dwelling

• पिशाच (piśāca) - a type of malevolent spirit (demon, goblin, flesh-eater)

• अप्सरसा (apsarasā) - by a female piśāca (demoness) or a piśāca-like apsaras (by an apsaras, by a celestial nymph)

• मासम् (māsam) - for a month

• पाश्चात्यः (pāścātyaḥ) - westerner, western

• कामुकीकृतः (kāmukīkṛtaḥ) - made lustful, made passionate, turned into a lover

Words meanings and morphology

शाकद्वीपे (śākadvīpe) - in Śākadvīpa

(proper noun)

Locative, masculine, singular of śākadvīpa

śākadvīpa - Śākadvīpa (a mythical continent)

Note: Locative singular of `śākadvīpa`.

अस्तशैलस्य (astaśailasya) - of Asta mountain (of the setting mountain)

(proper noun)

Genitive, masculine, singular of astaśaila

astaśaila - Asta mountain (the mythical western mountain where the sun sets)

Compound type : tatpuruṣa (asta+śaila)

• asta – setting, western, disappearance
  noun/adjective (masculine)
• śaila – mountain, rock
  noun (masculine)

Note: Possessive modifier of `śirasi`.

शिरसि (śirasi) - on the summit (of the mountain) (on the head, on the summit)

(noun)

Locative, neuter, singular of śiras

śiras - head, summit, top

Note: Refers to the top part of the mountain.

अभ्रगुहागृहे (abhraguhāgṛhe) - in a cloud-cave house/dwelling

(noun)

Locative, neuter, singular of abhraguhāgṛha

abhraguhāgṛha - cloud-cave dwelling, house in a cloud-cave

Compound type : tatpuruṣa (abhra+guhā+gṛha)

• abhra – cloud, sky
  noun (neuter)
• guhā – cave, cavern
  noun (feminine)
• gṛha – house, dwelling
  noun (neuter)

Note: Locative singular of `abhraguhāgṛha`.

पिशाच (piśāca) - a type of malevolent spirit (demon, goblin, flesh-eater)

(noun)

Nominative, masculine, singular of piśāca

piśāca - demon, goblin, ghoul, a class of malevolent spirits

Note: Describes the type of `apsarasā`.

अप्सरसा (apsarasā) - by a female piśāca (demoness) or a piśāca-like apsaras (by an apsaras, by a celestial nymph)

(noun)

Instrumental, feminine, singular of apsaras

apsaras - celestial nymph, a mythical female being of the clouds and waters

`s` stem noun, instrumental singular.

Note: The agent causing the transformation.

मासम् (māsam) - for a month

(noun)

Accusative, masculine, singular of māsa

māsa - month, moon

Note: Duration of the effect.

पाश्चात्यः (pāścātyaḥ) - westerner, western

(noun)

Nominative, masculine, singular of pāścātya

pāścātya - western, dwelling in the west, a westerner

Derived from `paścā` (behind, west) with suffix `-tya`.

Note: Subject of the sentence.

कामुकीकृतः (kāmukīkṛtaḥ) - made lustful, made passionate, turned into a lover

(adjective)

Nominative, masculine, singular of kāmukīkṛta

kāmukīkṛta - made passionate, made lustful, rendered amorous

Past Passive Participle

Derived from `kāmukin` (passionate, lustful) and root `kṛ` (to make) with suffix `-ta`. The 'ī' in `kāmukī` is a feminine suffix used when forming a compound with `kṛ` to mean 'made into a state of X', where X is `kāmukin`.

Compound type : tatpuruṣa (kāmukin+kṛta)

• kāmukin – lustful, passionate, desirous
  adjective (masculine)
  From kāma (desire)
• kṛta – made, done, created
  adjective
  Past Passive Participle
  From √kṛ (to do, make)
  Root: kṛ (class 8)

Note: Main predicate, describing the state of `pāścātyaḥ`.