योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-200, verse-58

अर्वाक्पुष्पाञ्जलिव्रातैः खात्सिद्धैः सममुज्झितैः ।
वसिष्ठं पूरयामासुर्हिमैरब्दा इवाचलम् ॥ ५८ ॥

arvākpuṣpāñjalivrātaiḥ khātsiddhaiḥ samamujjhitaiḥ ,
vasiṣṭhaṃ pūrayāmāsurhimairabdā ivācalam 58

58. arvāk puṣpāñjalivrātaiḥ khāt siddhaiḥ samam ujjhitaiḥ
vasiṣṭham pūrayāmāsuḥ himaiḥ abdāḥ iva acalam

58. khāt siddhaiḥ samam arvāk puṣpāñjalivrātaiḥ ujjhitaiḥ
abdāḥ himaiḥ acalam iva vasiṣṭham pūrayāmāsuḥ

58. From the sky, the Siddhas simultaneously showered down copious flower offerings upon Vasishtha, filling him just as clouds cover a mountain with snow.

Words meanings summery:

• अर्वाक् (arvāk) - downwards (onto Vasishtha) (downwards, below, in a downward direction)

• पुष्पाञ्जलिव्रातैः (puṣpāñjalivrātaiḥ) - with showers of flower offerings

• खात् (khāt) - from the sky, from space

• सिद्धैः (siddhaiḥ) - by the Siddhas, by perfected beings

• समम् (samam) - together, simultaneously, equally

• उज्झितैः (ujjhitaiḥ) - (flower offerings) that were showered down (by those thrown, by those cast down)

• वसिष्ठम् (vasiṣṭham) - The sage Vasishtha (Vasishtha)

• पूरयामासुः (pūrayāmāsuḥ) - they covered/filled (Vasishtha) (they filled, they caused to be full)

• हिमैः (himaiḥ) - with snow, with frost

• अब्दाः (abdāḥ) - clouds (clouds, years)

• इव (iva) - just as (like, as, as it were)

• अचलम् (acalam) - a mountain (a mountain, an immovable object)

Words meanings and morphology

अर्वाक् (arvāk) - downwards (onto Vasishtha) (downwards, below, in a downward direction)

(indeclinable)

पुष्पाञ्जलिव्रातैः (puṣpāñjalivrātaiḥ) - with showers of flower offerings

(noun)

Instrumental, masculine, plural of puṣpāñjalivrāta

puṣpāñjalivrāta - a multitude/shower of flower offerings

Compound type : tatpuruṣa (puṣpāñjali+vrāta)

• puṣpāñjali – a handful of flowers offered to a deity, flower offering
  noun (masculine)
  From puṣpa (flower) and añjali (cupped hands/offering).
• vrāta – multitude, host, collection, shower
  noun (masculine)

खात् (khāt) - from the sky, from space

(noun)

Ablative, neuter, singular of kha

kha - sky, atmosphere, space, ether, zero

Note: The final 't' is due to sandhi (khāt < kha + (ending)). It is an ablative singular.

सिद्धैः (siddhaiḥ) - by the Siddhas, by perfected beings

(noun)

Instrumental, masculine, plural of siddha

siddha - accomplished, perfected, successful, a class of semi-divine beings

Past Passive Participle

From root √sidh (to accomplish, succeed)

Root: sidh (class 1)

समम् (samam) - together, simultaneously, equally

(indeclinable)

उज्झितैः (ujjhitaiḥ) - (flower offerings) that were showered down (by those thrown, by those cast down)

(adjective)

Instrumental, masculine, plural of ujjhitaiḥ

ujjhitaiḥ - thrown, cast off, abandoned, showered

Past Passive Participle

From root √ujjh (to throw, abandon)

Root: ujjh

Note: Agrees with 'puṣpāñjalivrātaiḥ'.

वसिष्ठम् (vasiṣṭham) - The sage Vasishtha (Vasishtha)

(proper noun)

Accusative, masculine, singular of vasiṣṭha

vasiṣṭha - most excellent, best, a celebrated Vedic sage, family preceptor of Ikshvaku dynasty

Superlative form of 'vasu' (good, excellent).

पूरयामासुः (pūrayāmāsuḥ) - they covered/filled (Vasishtha) (they filled, they caused to be full)

(verb)

3rd person , plural, active, perfect (Lit) of pūrayati

Causative

From root √pṛ (to fill), ṇa-pratyaya for causative.

Root: pṛ (class 3)

Note: Periphrastic perfect, formed with 'āmāsuḥ'.

हिमैः (himaiḥ) - with snow, with frost

(noun)

Instrumental, masculine, plural of hima

hima - snow, frost, cold

अब्दाः (abdāḥ) - clouds (clouds, years)

(noun)

Nominative, masculine, plural of abda

abda - cloud, year (lit. 'water-giver')

Formed from ap (water) + dā (giver).

Compound type : tatpuruṣa (ap+da)

• ap – water
  noun (feminine)
• da – giver, bestower
  noun (masculine)
  From root √dā (to give).
  Root: dā (class 3)

इव (iva) - just as (like, as, as it were)

(indeclinable)

अचलम् (acalam) - a mountain (a mountain, an immovable object)

(noun)

Accusative, masculine, singular of acala

acala - immovable, steady, a mountain

From 'a' (not) + 'cala' (moving).

Compound type : nañ-tatpuruṣa (a+cala)

• a – not, non-, un-
  indeclinable
• cala – moving, trembling, inconstant
  adjective (masculine)
  From root √cal (to move).
  Root: cal (class 1)