वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-7, chapter-7, verse-6

राक्षसेन्द्रा गिरिनिभाः शरशक्त्यृष्टितोमरैः ।
निरुच्छ्वासं हरिं चक्रुः प्राणायाम इव द्विजम् ॥६॥

6. rākṣasendrā girinibhāḥ śaraśaktyṛṣṭitomaraiḥ ,
nirucchvāsaṃ hariṃ cakruḥ prāṇāyāma iva dvijam.

6. rākṣasa-indrāḥ giri-nibhāḥ śara-śakti-ṛṣṭi-tomaraiḥ
nirucchvāsam harim cakruḥ prāṇāyāmaḥ iva dvijam

6. giri-nibhāḥ rākṣasa-indrāḥ śara-śakti-ṛṣṭi-tomaraiḥ
harim nirucchvāsam cakruḥ iva dvijam prāṇāyāmaḥ

6. The mighty leaders of the rākṣasas, resembling mountains, rendered Viṣṇu breathless with their arrows, spears, javelins, and lances, as if a twice-born (dvija) were performing breath control (prāṇāyāma).

Words meanings summery:

• राक्षस-इन्द्राः (rākṣasa-indrāḥ) - mighty leaders of the rākṣasas (chief rākṣasas, kings of rākṣasas)

• गिरि-निभाः (giri-nibhāḥ) - mountain-like, resembling mountains

• शर-शक्ति-ऋष्टि-तोमरैः (śara-śakti-ṛṣṭi-tomaraiḥ) - with arrows, spears, javelins, and lances (a collection of weapons)

• निरुच्छ्वासम् (nirucchvāsam) - breathless, without breath

• हरिम् (harim) - Lord Viṣṇu (Hari (Viṣṇu, Kṛṣṇa, or Rāma))

• चक्रुः (cakruḥ) - they made, they did

• प्राणायामः (prāṇāyāmaḥ) - breath control, prāṇāyāma

• इव (iva) - like, as, as if

• द्विजम् (dvijam) - a Brahmin (a twice-born (Brahmin, Kṣatriya, Vaiśya))

Words meanings and morphology

राक्षस-इन्द्राः (rākṣasa-indrāḥ) - mighty leaders of the rākṣasas (chief rākṣasas, kings of rākṣasas)

(noun)

Nominative, masculine, plural of rākṣasendra

rākṣasendra - chief of rākṣasas, king of rākṣasas

compound of rākṣasa and indra

Compound type : tatpurusha (rākṣasa+indra)

• rākṣasa – rākṣasa, demon
  noun (masculine)
• indra – chief, lord, king
  noun (masculine)

Note: The leaders of the rākṣasa army.

गिरि-निभाः (giri-nibhāḥ) - mountain-like, resembling mountains

(adjective)

Nominative, masculine, plural of girinibha

girinibha - mountain-like

compound of giri and nibha

Compound type : tatpurusha (giri+nibha)

• giri – mountain
  noun (masculine)
• nibha – like, resembling, similar
  adjective (masculine)

Note: Describes the rākṣasa leaders' imposing size.

शर-शक्ति-ऋष्टि-तोमरैः (śara-śakti-ṛṣṭi-tomaraiḥ) - with arrows, spears, javelins, and lances (a collection of weapons)

(noun)

Instrumental, masculine, plural of śaraśaktyṛṣṭitomara

śaraśaktyṛṣṭitomara - arrows, spears, javelins, and lances (as a collective)

dvandva compound of various weapons

Compound type : dvandva (śara+śakti+ṛṣṭi+tomara)

• śara – arrow
  noun (masculine)
  Root: śṝ (class 9)
• śakti – spear, lance, dart, power
  noun (feminine)
  Root: śak (class 5)
• ṛṣṭi – javelin, spear
  noun (feminine)
• tomara – lance, iron club
  noun (masculine)

Note: The instruments used for attack.

निरुच्छ्वासम् (nirucchvāsam) - breathless, without breath

(adjective)

Accusative, masculine, singular of nirucchvāsa

nirucchvāsa - breathless, without breath

compound of nis (negative prefix) and ucchvāsa (breath)

Compound type : avyayibhava (nis+ucchvāsa)

• nis – without, out, away
  indeclinable
  prefix indicating negation or absence
• ucchvāsa – exhalation, breath
  noun (masculine)
  derived from root śvas with prefix ud
  Prefix: ud
  Root: śvas (class 2)

Note: Qualifies Viṣṇu.

हरिम् (harim) - Lord Viṣṇu (Hari (Viṣṇu, Kṛṣṇa, or Rāma))

(proper noun)

Accusative, masculine, singular of hari

hari - Viṣṇu, Kṛṣṇa, lion, sun, monkey, horse

Root: hṛ (class 1)

Note: The object of the action.

चक्रुः (cakruḥ) - they made, they did

(verb)

3rd person , plural, active, perfect (lit) of kṛ

perfect

3rd person plural perfect active

Root: kṛ (class 8)

प्राणायामः (prāṇāyāmaḥ) - breath control, prāṇāyāma

(noun)

Nominative, masculine, singular of prāṇāyāma

prāṇāyāma - breath control, prolongation of breath

compound of prāṇa and āyāma

Compound type : tatpurusha (prāṇa+āyāma)

• prāṇa – breath, vital air, life
  noun (masculine)
  Root: an (class 2)
• āyāma – lengthening, extension, restraint
  noun (masculine)
  derived from root yam with prefix ā
  Prefix: ā
  Root: yam (class 1)

Note: The practice of breath control.

इव (iva) - like, as, as if

(indeclinable)

particle of comparison

द्विजम् (dvijam) - a Brahmin (a twice-born (Brahmin, Kṣatriya, Vaiśya))

(noun)

Accusative, masculine, singular of dvija

dvija - twice-born, Brahmin, bird, tooth

compound of dvi (two) and ja (born)

Compound type : tatpurusha (dvi+ja)

• dvi – two
  numeral
• ja – born, produced
  adjective (masculine)
  derived from root jan (to be born)
  Root: jan (class 4)

Note: Here in comparison to Viṣṇu.