योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-19, verse-7

यस्तदोड्डयनोत्कानां शरभाणां विजृम्भितैः ।
विस्फूर्जति गुहावक्रैः कल्पाभ्राणि हसन्निव ॥ ७ ॥

yastadoḍḍayanotkānāṃ śarabhāṇāṃ vijṛmbhitaiḥ ,
visphūrjati guhāvakraiḥ kalpābhrāṇi hasanniva 7

7. yaḥ tadā uḍḍayanotkānām śarabhāṇām vijr̥mbhitaiḥ
visphūrjati guhāvakraiḥ kalpābhrāṇi hasan iva

7. yaḥ tadā uḍḍayanotkānām śarabhāṇām vijr̥mbhitaiḥ
guhāvakraiḥ kalpābhrāṇi hasan iva visphūrjati

7. Who then appears formidable with its cavernous mouths, by means of the grand displays of the śarabhas (mythical creatures) eager for flight, as if laughing at the clouds of cosmic dissolution (kalpābhrāṇi).

Words meanings summery:

• यः (yaḥ) - Who (referring to the mountain, implied subject) (who, which (masculine singular))

• तदा (tadā) - then, at that time (referring to the mountain's state) (then, at that time)

• उड्डयनोत्कानाम् (uḍḍayanotkānām) - of those (śarabhas) eager for flight (of those eager for flight)

• शरभाणाम् (śarabhāṇām) - of the śarabhas (mythical creatures) (of śarabhas)

• विज्र्̥म्भितैः (vijr̥mbhitaiḥ) - by the grand displays/movements (of the śarabhas) (by displays, frolics, roars, stretchings)

• विस्फूर्जति (visphūrjati) - (the mountain) appears formidable/bursts forth (flashes, thunders, appears formidable, bursts forth)

• गुहावक्रैः (guhāvakraiḥ) - by its cavernous mouths / curved caves (by curved caves, by mouths of caves)

• कल्पाभ्राणि (kalpābhrāṇi) - the clouds of cosmic dissolution (kalpābhrāṇi) (clouds of cosmic dissolution)

• हसन् (hasan) - (the mountain) laughing (laughing)

• इव (iva) - as if, seems to (as if, like, similar to)

Words meanings and morphology

यः (yaḥ) - Who (referring to the mountain, implied subject) (who, which (masculine singular))

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what

Relative pronoun.

तदा (tadā) - then, at that time (referring to the mountain's state) (then, at that time)

(indeclinable)

Adverb formed from 'tad'.

उड्डयनोत्कानाम् (uḍḍayanotkānām) - of those (śarabhas) eager for flight (of those eager for flight)

(adjective)

Genitive, masculine, plural of uḍḍayanotka

uḍḍayanotka - eager for flight, longing for flight

Compound.

Compound type : tatpuruṣa (uḍḍayana+utka)

• uḍḍayana – flight, soaring
  noun (neuter)
  Derived from root 'ḍī' (to fly) with prefix 'ut-'.
  Prefix: ut
  Root: ḍī (class 4)
• utka – eager, longing, desirous
  adjective (masculine)
  From root 'kam' (to desire) with 'ut' prefix, or related to 'ut + i' (to go up).
  Prefix: ut

Note: Qualifies 'śarabhāṇām'.

शरभाणाम् (śarabhāṇām) - of the śarabhas (mythical creatures) (of śarabhas)

(noun)

Genitive, masculine, plural of śarabha

śarabha - a mythical eight-legged beast, fiercer than a lion, sometimes depicted as a bird

Note: Possessive or agent for 'vijr̥mbhitaiḥ'.

विज्र्̥म्भितैः (vijr̥mbhitaiḥ) - by the grand displays/movements (of the śarabhas) (by displays, frolics, roars, stretchings)

(noun)

Instrumental, neuter, plural of vijr̥mbhita

vijr̥mbhita - displayed, yawned, stretched, frolicked

Past Passive Participle (substantivized)

Derived from root 'jr̥mbh' (to yawn, to stretch) with prefix 'vi-' and 'kta' suffix. Used as a noun here.

Prefix: vi

Root: jr̥mbh (class 1)

विस्फूर्जति (visphūrjati) - (the mountain) appears formidable/bursts forth (flashes, thunders, appears formidable, bursts forth)

(verb)

3rd person , singular, active, present (laṭ) of visphūrj

Present Active Indicative

3rd person singular, parasmaipada. From root 'sphūrj' with 'vi-'.

Prefix: vi

Root: sphūrj (class 1)

गुहावक्रैः (guhāvakraiḥ) - by its cavernous mouths / curved caves (by curved caves, by mouths of caves)

(noun)

Instrumental, masculine, plural of guhāvakra

guhāvakra - curved cave, mouth of a cave

Compound.

Compound type : tatpuruṣa (guhā+vakra)

• guhā – cave, cavern
  noun (feminine)
  Root: guh (class 1)
• vakra – curved, bent, crooked; a mouth (of a cave, river)
  adjective (masculine)
  From root 'vaṅk' (to be crooked).
  Root: vaṅk (class 1)

कल्पाभ्राणि (kalpābhrāṇi) - the clouds of cosmic dissolution (kalpābhrāṇi) (clouds of cosmic dissolution)

(noun)

Accusative, neuter, plural of kalpābhrā

kalpābhrā - clouds of cosmic dissolution, doomsday clouds

Compound.

Compound type : tatpuruṣa (kalpa+abhrā)

• kalpa – a cosmic period of time, a day of Brahmā; a religious ordinance; a resolution
  noun (masculine)
  Root: kḷp (class 1)
• abhrā – cloud
  noun (neuter)
  Root: abhr (class 1)

Note: The object of the action implied by 'hasan iva'.

हसन् (hasan) - (the mountain) laughing (laughing)

(adjective)

Nominative, masculine, singular of hasat

hasat - laughing

Present Active Participle

Derived from root 'has' (to laugh) with 'śatr̥' suffix. Masculine singular nominative form 'hasan'.

Root: has (class 1)

इव (iva) - as if, seems to (as if, like, similar to)

(indeclinable)