योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-49, verse-4

विदूरथोऽथ तत्याज पार्वतास्त्रं महास्त्रवित् ।
व्योमापि घनतोयेन समादातुमिवोद्यतम् ॥ ४ ॥

vidūratho'tha tatyāja pārvatāstraṃ mahāstravit ,
vyomāpi ghanatoyena samādātumivodyatam 4

4. vidūrarathaḥ atha tatyāja pārvasatram mahāstravit
vyoma api ghanatoyena samādātum iva udyatam

4. atha mahāstravit vidūrarathaḥ pārvasatram tatyāja
vyoma api ghanatoyena samādātum iva udyatam

4. Then Vidūratha, a master of great weapons, released the mountain (pārvata) weapon. It was as if even the sky was preparing to engulf everything with dense clouds and rain.

Words meanings summery:

• विदूररथः (vidūrarathaḥ) - Vidūratha

• अथ (atha) - then, now

• तत्याज (tatyāja) - released, cast, abandoned

• पार्वसत्रम् (pārvasatram) - the mountain weapon

• महास्त्रवित् (mahāstravit) - master of great weapons, expert in great weapons

• व्योम (vyoma) - sky, atmosphere

• अपि (api) - even, also

• घनतोयेन (ghanatoyena) - by dense water, by thick clouds and rain

• समादातुम् (samādātum) - to gather, to collect, to engulf

• इव (iva) - as if, like

• उद्यतम् (udyatam) - prepared, ready, exerted

Words meanings and morphology

विदूररथः (vidūrarathaḥ) - Vidūratha

(proper noun)

Nominative, masculine, singular of vidūraratha

vidūraratha - name of a king or warrior

Note: Subject of the sentence.

अथ (atha) - then, now

(indeclinable)

तत्याज (tatyāja) - released, cast, abandoned

(verb)

3rd person , singular, active, past perfect (liṭ) of tyaj

Perfect tense, 3rd person singular, active voice

From the root √tyaj, perfect tense (liṭ) form.

Root: tyaj (class 1)

पार्वसत्रम् (pārvasatram) - the mountain weapon

(noun)

Accusative, neuter, singular of pārvasatra

pārvasatra - mountain weapon (astra)

Compound type : tatpuruṣa (pārvata+astra)

• pārvata – related to mountains, mountain-born, mountain-like
  adjective (masculine)
  Derived from 'parvata' (mountain)
• astra – weapon, missile, magical weapon
  noun (neuter)
  Root: as (class 4)

Note: Object of 'tatyāja'.

महास्त्रवित् (mahāstravit) - master of great weapons, expert in great weapons

(noun)

Nominative, masculine, singular of mahāstravit

mahāstravit - one who knows great weapons

Compound type : bahuvrīhi (mahā+astra+vit)

• mahā – great, mighty, large
  adjective (masculine)
• astra – weapon, missile
  noun (neuter)
  Root: as (class 4)
• vit – knower, expert
  noun (masculine)
  Derived from the root √vid (to know).
  Root: vid (class 2)

Note: An epithet for Vidūratha.

व्योम (vyoma) - sky, atmosphere

(noun)

Nominative, neuter, singular of vyoman

vyoman - sky, atmosphere, air

Note: Subject of the simile.

अपि (api) - even, also

(indeclinable)

Note: Emphasizes the sky.

घनतोयेन (ghanatoyena) - by dense water, by thick clouds and rain

(noun)

Instrumental, neuter, singular of ghanatoya

ghanatoya - dense water, thick rain/clouds

Compound type : karmadhāraya (ghana+toya)

• ghana – dense, thick, compact; cloud
  adjective (masculine)
• toya – water
  noun (neuter)
  Root: tu (class 1)

समादातुम् (samādātum) - to gather, to collect, to engulf

(verb)

infinitive of samādā

Infinitive

Infinitive form from root √dā (to give, here with prefixes to take/collect)

Prefixes: sam+ā

Root: dā (class 3)

इव (iva) - as if, like

(indeclinable)

Note: Introduces a simile.

उद्यतम् (udyatam) - prepared, ready, exerted

(adjective)

Nominative, neuter, singular of udyata

udyata - prepared, ready, exerted, raised

Past Passive Participle

PPP of root √yam with prefix ud-.

Prefix: ud

Root: yam (class 1)

Note: Agrees with 'vyoma'.