योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-86, verse-46

रक्षसा रावणेनैव क्वचिद्विहतराघवम् ।
भूस्थपादेन देवाद्रिशिरस्थशिरसा परम् ॥ ४६ ॥

rakṣasā rāvaṇenaiva kvacidvihatarāghavam ,
bhūsthapādena devādriśirasthaśirasā param 46

46. rakṣasā rāvaṇena eva kvacid vihata-rāghavam
bhūstha-pādena devādri-śirastha-śirasā param

46. kvacid rakṣasā rāvaṇena eva vihata-rāghavam (asti)
bhūstha-pādena devādri-śirastha-śirasā param (asti)

46. And sometimes, Rāghava (Rāma) is defeated by the demon Rāvaṇa himself; furthermore, (there is a supreme vision/being) with one foot standing on the earth and its head resting on the peak of a divine mountain.

Words meanings summery:

• रक्षसा (rakṣasā) - by the demon

• रावणेन (rāvaṇena) - by Rāvaṇa

• एव (eva) - himself (emphasizing the agent) (certainly, indeed, only, even)

• क्वचिद् (kvacid) - sometimes (sometimes, somewhere, in some place)

• विहत-राघवम् (vihata-rāghavam) - where Rāghava (Rāma) is defeated (where Rāghava is defeated/struck down)

• भूस्थ-पादेन (bhūstha-pādena) - with one foot standing on the earth (with a foot standing on the earth)

• देवाद्रि-शिरस्थ-शिरसा (devādri-śirastha-śirasā) - with its head resting on the peak of a divine mountain (with a head standing on the peak of a divine mountain)

• परम् (param) - the supreme (vision/being), furthermore (supreme, ultimate, principal, moreover, beyond)

Words meanings and morphology

रक्षसा (rakṣasā) - by the demon

(noun)

Instrumental, masculine, singular of rakṣas

rakṣas - demon, evil spirit, monster

रावणेन (rāvaṇena) - by Rāvaṇa

(proper noun)

Instrumental, masculine, singular of rāvaṇa

rāvaṇa - Rāvaṇa (the demon king of Laṅkā)

एव (eva) - himself (emphasizing the agent) (certainly, indeed, only, even)

(indeclinable)

क्वचिद् (kvacid) - sometimes (sometimes, somewhere, in some place)

(indeclinable)

Note: Sandhi: kvacit + vihata becomes kvacid vihata

विहत-राघवम् (vihata-rāghavam) - where Rāghava (Rāma) is defeated (where Rāghava is defeated/struck down)

(adjective)

Accusative, neuter, singular of vihata-rāghava

vihata-rāghava - having Rāghava defeated/struck down

Bahuvrīhi compound describing a state or quality

Compound type : Bahuvrīhi (vihata+rāghava)

• vihata – defeated, struck down, killed, injured
  adjective
  Past Passive Participle
  from root han with prefix vi
  Prefix: vi
  Root: han (class 2)
• rāghava – Rāghava (descendant of Raghu, an epithet for Rāma)
  proper noun (masculine)

Note: Adjective describing an implied object (e.g., 'the world' or 'the scene')

भूस्थ-पादेन (bhūstha-pādena) - with one foot standing on the earth (with a foot standing on the earth)

(noun)

Instrumental, masculine, singular of bhūstha-pāda

bhūstha-pāda - foot standing on the earth

Tatpuruṣa compound

Compound type : Tatpuruṣa (bhūstha+pāda)

• bhūstha – standing on the earth, terrestrial
  adjective
  compound of bhū (earth) + stha (standing)
  Root: sthā (class 1)
• pāda – foot, leg, ray, quarter
  noun (masculine)

Note: Used here to describe a characteristic of an implied being/vision.

देवाद्रि-शिरस्थ-शिरसा (devādri-śirastha-śirasā) - with its head resting on the peak of a divine mountain (with a head standing on the peak of a divine mountain)

(noun)

Instrumental, neuter, singular of devādri-śirastha-śiras

devādri-śirastha-śiras - head standing on the peak of a divine mountain

Tatpuruṣa compound

Compound type : Tatpuruṣa (devādri+śirastha+śiras)

• devādri – mountain of the gods, divine mountain
  noun (masculine)
  compound of deva (god) + adri (mountain)
• śirastha – standing on the head/top, situated on the summit
  adjective
  compound of śiras (head/top) + stha (standing)
  Root: sthā (class 1)
• śiras – head, top, peak
  noun (neuter)

Note: Used here to describe a characteristic of an implied being/vision.

परम् (param) - the supreme (vision/being), furthermore (supreme, ultimate, principal, moreover, beyond)

(adjective)

Accusative, neuter, singular of para

para - supreme, highest, ultimate, distant, other, subsequent

Note: Can also function adverbially as 'moreover' or 'further'. Here interpreted as an adjective describing the implied cosmic vision/being.