योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-48, verse-47

अथ कोपाकुलः सिन्धू राक्षसास्त्रं महाभयम् ।
क्षणादुदीरयामास मन्त्रोदीर्णशरात्मकम् ॥ ४७ ॥

atha kopākulaḥ sindhū rākṣasāstraṃ mahābhayam ,
kṣaṇādudīrayāmāsa mantrodīrṇaśarātmakam 47

47. atha kopākulaḥ sindhū rākṣasāstram mahābhayam
kṣaṇāt udīrayāmāsa mantrodīrṇaśarātmakam

47. atha kopākulaḥ sindhū kṣaṇāt mahābhayam
mantrodīrṇaśarātmakam rākṣasāstram udīrayāmāsa

47. Then, agitated by anger, King Sindhu instantly discharged the demonic weapon, which was immensely terrifying and inherently consisted of arrows imbued with sacred incantations (mantras).

Words meanings summery:

• अथ (atha) - then, now, moreover

• कोपाकुलः (kopākulaḥ) - agitated/overwhelmed by anger

• सिन्धू (sindhū) - King Sindhu (Sindhu (name of a king, or the ocean))

• राक्षसास्त्रम् (rākṣasāstram) - demonic weapon

• महाभयम् (mahābhayam) - greatly terrifying, causing great fear

• क्षणात् (kṣaṇāt) - instantly, in a moment

• उदीरयामास (udīrayāmāsa) - discharged (caused to rise, emitted, discharged, uttered)

• मन्त्रोदीर्णशरात्मकम् (mantrodīrṇaśarātmakam) - inherently consisting of arrows imbued with sacred incantations (mantras) (having the nature of arrows uttered by mantras)

Words meanings and morphology

अथ (atha) - then, now, moreover

(indeclinable)

कोपाकुलः (kopākulaḥ) - agitated/overwhelmed by anger

(adjective)

Nominative, masculine, singular of kopākula

kopākula - agitated by anger, distraught with rage

Compound: `kopa` (anger) + `ākula` (agitated, disturbed).

Compound type : Tatpuruṣa (kopa+ākula)

• kopa – anger, wrath
  noun (masculine)
  Root: kup (class 4)
• ākula – agitated, disturbed, filled with
  adjective (masculine/neuter)
  From `ā` (prefix) + root `kul` (to collect).
  Prefix: ā
  Root: kul (class 1)

Note: Agrees with `sindhū`.

सिन्धू (sindhū) - King Sindhu (Sindhu (name of a king, or the ocean))

(proper noun)

Nominative, masculine, singular of sindhu

sindhu - Sindhu (proper name), river, ocean

राक्षसास्त्रम् (rākṣasāstram) - demonic weapon

(noun)

Accusative, neuter, singular of rākṣasāstra

rākṣasāstra - demonic weapon, weapon of demons

Compound: `rākṣasa` (demonic) + `astra` (weapon).

Compound type : Tatpuruṣa (rākṣasa+astra)

• rākṣasa – demonic, belonging to rākṣasas
  adjective (masculine)
  From `rākṣas` (demon).
• astra – weapon, missile
  noun (neuter)
  Root: as (class 4)

महाभयम् (mahābhayam) - greatly terrifying, causing great fear

(adjective)

Accusative, neuter, singular of mahābhaya

mahābhaya - greatly terrifying, huge fear

Compound: `mahā` (great) + `bhaya` (fear, terrifying).

Compound type : Karmadhāraya (mahā+bhaya)

• mahā – great, mighty
  adjective (feminine)
• bhaya – fear, terror; causing fear
  noun/adjective (neuter)
  From root `bhī` (to fear).
  Root: bhī (class 3)

Note: Agrees with `rākṣasāstram`.

क्षणात् (kṣaṇāt) - instantly, in a moment

(noun)

Ablative, masculine, singular of kṣaṇa

kṣaṇa - moment, instant

Ablative singular used adverbially.

Root: kṣaṇ (class 1)

Note: Used adverbially.

उदीरयामास (udīrayāmāsa) - discharged (caused to rise, emitted, discharged, uttered)

(verb)

3rd person , singular, active, perfect (periphrastic) (Lit) of udīrayati

Perfect tense, 3rd person singular (periphrastic perfect with `āmāsa`)

Causative of root `īr` (to stir, move) with prefix `ud`. `ud + īr + ṇic + āmāsa`.

Prefix: ud

Root: īr (class 2)

मन्त्रोदीर्णशरात्मकम् (mantrodīrṇaśarātmakam) - inherently consisting of arrows imbued with sacred incantations (mantras) (having the nature of arrows uttered by mantras)

(adjective)

Accusative, neuter, singular of mantrodīrṇaśarātmaka

mantrodīrṇaśarātmaka - having the nature of arrows uttered/impelled by mantras

Compound: `mantra` (incantation) + `udīrṇa` (uttered/impelled, PCP) + `śara` (arrow) + `ātmaka` (having the nature of). `mantrair udīrṇāḥ śarāḥ eva ātmakaḥ asya tat`.

Compound type : Bahuvrīhi (mantra+udīrṇa+śara+ātmaka)

• mantra – sacred utterance, incantation, spell (mantra)
  noun (masculine)
  From root `man` (to think) + `tra` suffix.
  Root: man (class 4)
• udīrṇa – uttered, impelled, risen
  adjective (masculine/neuter)
  Past Passive Participle
  From root `īr` with prefix `ud`.
  Prefix: ud
  Root: īr (class 2)
• śara – arrow
  noun (masculine)
  Root: śṛ (class 1)
• ātmaka – having the nature of, consisting of
  adjective (masculine/neuter)
  From `ātman` + `ka` suffix.

Note: Agrees with `rākṣasāstram`.