वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-55, verse-123

स तन्महापर्वतकूटसंनिभं विवृत्तदंष्ट्रं चलचारुकुण्डलम् ।
चकर्त रक्षोऽधिपतेः शिरस्तदा यथैव वृत्रस्य पुरा पुरंदरः ॥१२३॥

123. sa tanmahāparvatakūṭasaṃnibhaṃ vivṛttadaṃṣṭraṃ calacārukuṇḍalam ,
cakarta rakṣo'dhipateḥ śirastadā yathaiva vṛtrasya purā puraṃdaraḥ.

123. saḥ tat mahāparvatakūṭasaṃnibham
vivṛttadaṃṣṭram calacārukuṇḍalam
cakarta rakṣaḥ adhipateḥ śiraḥ tadā
yathā eva vṛtrasya purā purandaraḥ

123. He then severed that head of the lord of the rākṣasas, which resembled a colossal mountain peak, with bared fangs and gleaming, swinging earrings, just as Indra had formerly severed the head of Vṛtra.

Words meanings summery:

• सः (saḥ) - He (referring to Rāma) (he, that)

• तत् (tat) - that (referring to the head) (that, it)

• महापर्वतकूटसंनिभम् (mahāparvatakūṭasaṁnibham) - resembling a colossal mountain peak (describing Rāvaṇa's head) (resembling a great mountain peak)

• विवृत्तदंष्ट्रम् (vivṛttadaṁṣṭram) - with bared fangs (describing Rāvaṇa's head) (with bared fangs)

• चलचारुकुण्डलम् (calacārukuṇḍalam) - with gleaming, swinging earrings (describing Rāvaṇa's head) (with beautiful swinging earrings)

• चकर्त (cakarta) - severed (cut off, severed)

• रक्षः (rakṣaḥ) - rākṣasa (demon) (demon, rākṣasa)

• अधिपतेः (adhipateḥ) - of the lord (referring to Rāvaṇa) (of the lord, of the ruler)

• शिरः (śiraḥ) - head (Rāvaṇa's head) (head)

• तदा (tadā) - then (then, at that time)

• यथा (yathā) - just as (as, just as, according to)

• एव (eva) - just (only, just, indeed)

• वृत्रस्य (vṛtrasya) - of Vṛtra

• पुरा (purā) - formerly (formerly, in ancient times)

• पुरन्दरः (purandaraḥ) - Indra (Indra, destroyer of cities)

Words meanings and morphology

सः (saḥ) - He (referring to Rāma) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

तत् (tat) - that (referring to the head) (that, it)

(pronoun)

Accusative, neuter, singular of tad

tad - that, he, she, it

महापर्वतकूटसंनिभम् (mahāparvatakūṭasaṁnibham) - resembling a colossal mountain peak (describing Rāvaṇa's head) (resembling a great mountain peak)

(adjective)

Accusative, neuter, singular of mahāparvatakūṭasaṃnibha

mahāparvatakūṭasaṁnibha - resembling a great mountain peak

Compound type : bahuvrihi (mahā+parvata+kūṭa+saṃnibha)

• mahā – great, large
  adjective (feminine)
• parvata – mountain, hill
  noun (masculine)
• kūṭa – peak, summit
  noun (neuter)
• saṃnibha – similar to, resembling, like
  adjective (masculine)
  Derived from `sam` (with, together) + `nibh` (to shine, appear)
  Prefix: sam
  Root: nibh (class 1)

Note: Compound modifying 'śiraḥ'

विवृत्तदंष्ट्रम् (vivṛttadaṁṣṭram) - with bared fangs (describing Rāvaṇa's head) (with bared fangs)

(adjective)

Accusative, neuter, singular of vivṛttadaṃṣṭra

vivṛttadaṁṣṭra - with bared fangs

Compound type : bahuvrihi (vivṛtta+daṃṣṭra)

• vivṛtta – bared, opened, turned back
  participle (neuter)
  Past Passive Participle
  From `vi` (apart, away) + root `vṛt` (to turn, open)
  Prefix: vi
  Root: vṛt (class 1)
• daṃṣṭra – fang, tusk
  noun (feminine)

Note: Compound modifying 'śiraḥ'

चलचारुकुण्डलम् (calacārukuṇḍalam) - with gleaming, swinging earrings (describing Rāvaṇa's head) (with beautiful swinging earrings)

(adjective)

Accusative, neuter, singular of calacārukuṇḍala

calacārukuṇḍala - with beautiful swinging earrings

Compound type : bahuvrihi (calat+cāru+kuṇḍala)

• calat – moving, shaking, swinging
  participle (neuter)
  Present Active Participle
  From root `cal` (to move); the stem `calat` forms `cala` in compounds.
  Root: cal (class 1)
• cāru – beautiful, charming, gleaming
  adjective (neuter)
• kuṇḍala – earring, ring
  noun (neuter)

Note: Compound modifying 'śiraḥ'

चकर्त (cakarta) - severed (cut off, severed)

(verb)

3rd person , singular, active, perfect (liṭ) of kṛt

Perfect Active

3rd person singular, Perfect tense, Parasmaipada, from root `kṛt`

Root: kṛt (class 6)

रक्षः (rakṣaḥ) - rākṣasa (demon) (demon, rākṣasa)

(noun)

Nominative, neuter, singular of rakṣas

rakṣas - demon, rākṣasa

Note: Prior member of the compound 'rakṣaḥ adhipateḥ'

अधिपतेः (adhipateḥ) - of the lord (referring to Rāvaṇa) (of the lord, of the ruler)

(noun)

Genitive, masculine, singular of adhipati

adhipati - lord, ruler, master

From `adhi` (over, upon) + `pati` (master)

Note: `rakṣaḥ adhipateḥ` forms a tatpuruṣa compound `rakṣo'dhipati`, where `adhipati` is the head noun.

शिरः (śiraḥ) - head (Rāvaṇa's head) (head)

(noun)

Accusative, neuter, singular of śiras

śiras - head

Note: Object of `cakarta`

तदा (tadā) - then (then, at that time)

(indeclinable)

Derived from pronominal base `tad`

Note: Temporal adverb

यथा (yathā) - just as (as, just as, according to)

(indeclinable)

Note: Adverb introducing a comparison

एव (eva) - just (only, just, indeed)

(indeclinable)

वृत्रस्य (vṛtrasya) - of Vṛtra

(proper noun)

Genitive, masculine, singular of vṛtra

vṛtra - Vṛtra (name of an asura, a dragon or serpent)

Note: Indicates possession or relation for the implied 'head'

पुरा (purā) - formerly (formerly, in ancient times)

(indeclinable)

पुरन्दरः (purandaraḥ) - Indra (Indra, destroyer of cities)

(proper noun)

Nominative, masculine, singular of purandara

purandara - Indra (epithet: destroyer of cities)

Compound meaning "city-destroyer" (`puram dārayati iti`)

Root: dṛ (class 10)

Note: Subject of the implied verb (severed) in the comparison.