वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-7, chapter-77, verse-9

ततो ऽश्वमेधः सुमहान्महेन्द्रस्य महात्मनः ।
ववृधे ब्रह्महत्यायाः पावनार्थं नरेश्वर ॥९॥

9. tato'śvamedhaḥ sumahānmahendrasya mahātmanaḥ ,
vavṛdhe brahmahatyāyāḥ pāvanārthaṃ nareśvara.

9. tataḥ aśvamedhaḥ sumahān mahendrasya mahātmanaḥ
vavṛdhe brahmahatyāyāḥ pāvanārtham nareśvara

9. tataḥ nareśvara mahendrasya mahātmanaḥ sumahān
aśvamedhaḥ brahmahatyāyāḥ pāvanārtham vavṛdhe

9. Then, O lord of men (nareśvara), the very great aśvamedha (Vedic ritual) of the great-souled (mahātman) Mahendra flourished for the purification of the brahmin-killing (brahmahatyā).

Words meanings summery:

• ततः (tataḥ) - then, thereupon, from that

• अश्वमेधः (aśvamedhaḥ) - the great Vedic ritual (yajña) known as aśvamedha (horse-sacrifice, aśvamedha)

• सुमहान् (sumahān) - very great, very mighty

• महेन्द्रस्य (mahendrasya) - of Indra, who is called Mahendra (of Mahendra)

• महात्मनः (mahātmanaḥ) - of the great-souled (mahātman) Mahendra (Indra) (of the great-souled one, of the noble-minded)

• ववृधे (vavṛdhe) - grew, increased, flourished

• ब्रह्महत्यायाः (brahmahatyāyāḥ) - of the sin of brahmin-killing (brahmahatyā) (of brahmin-killing, of brahminicide)

• पावनार्थम् (pāvanārtham) - for the purpose of purification, for purification

• नरेश्वर (nareśvara) - O king (vocative address to the listener or narrator) (O lord of men, O king)

Words meanings and morphology

ततः (tataḥ) - then, thereupon, from that

(indeclinable)

Derived from tad with suffix -tas

अश्वमेधः (aśvamedhaḥ) - the great Vedic ritual (yajña) known as aśvamedha (horse-sacrifice, aśvamedha)

(noun)

Nominative, masculine, singular of aśvamedha

aśvamedha - horse-sacrifice, aśvamedha (a major Vedic ritual)

Compound type : tatpuruṣa (aśva+medha)

• aśva – horse
  noun (masculine)
• medha – Vedic ritual, oblation, sacrifice
  noun (masculine)

सुमहान् (sumahān) - very great, very mighty

(adjective)

Nominative, masculine, singular of sumahat

sumahat - very great, very mighty, highly esteemed

Compound type : karmadhāraya (su+mahat)

• su – good, well, very
  indeclinable
• mahat – great, large, mighty
  adjective

Note: Qualifies 'aśvamedhaḥ'

महेन्द्रस्य (mahendrasya) - of Indra, who is called Mahendra (of Mahendra)

(proper noun)

Genitive, masculine, singular of mahendra

mahendra - great Indra, Mahendra

Compound type : karmadhāraya (mahā+indra)

• mahā – great, mighty
  adjective (feminine)
• indra – Indra (name of a Vedic deity)
  proper noun (masculine)

महात्मनः (mahātmanaḥ) - of the great-souled (mahātman) Mahendra (Indra) (of the great-souled one, of the noble-minded)

(adjective)

Genitive, masculine, singular of mahātman

mahātman - great-souled, noble, magnanimous

Compound type : bahuvrihi (mahā+ātman)

• mahā – great, mighty
  adjective (feminine)
• ātman – self, soul, spirit, essence
  noun (masculine)

Note: Qualifies 'mahendrasya'

ववृधे (vavṛdhe) - grew, increased, flourished

(verb)

3rd person , singular, middle, perfect (lit) of vṛdh

Perfect tense, middle voice form of root vṛdh

Root: vṛdh (class 1)

ब्रह्महत्यायाः (brahmahatyāyāḥ) - of the sin of brahmin-killing (brahmahatyā) (of brahmin-killing, of brahminicide)

(noun)

Genitive, feminine, singular of brahmahatyā

brahmahatyā - brahminicide, the killing of a brahmin (a great sin)

Compound type : tatpuruṣa (brahman+hatyā)

• brahman – brahmin (a member of the priestly class), sacred word, ultimate reality
  noun (masculine)
• hatyā – killing, murder, slaughter
  noun (feminine)

पावनार्थम् (pāvanārtham) - for the purpose of purification, for purification

(indeclinable)

Compound type : tatpuruṣa (pāvana+artha)

• pāvana – purifying, purification, sanctifying
  noun (neuter)
  Derived from root pū (to purify)
  Root: pū (class 1)
• artha – purpose, aim, meaning, wealth
  noun (masculine)

Note: Functions as an adverb here, indicating purpose.

नरेश्वर (nareśvara) - O king (vocative address to the listener or narrator) (O lord of men, O king)

(noun)

Vocative, masculine, singular of nareśvara

nareśvara - lord of men, king

Compound type : tatpuruṣa (nara+īśvara)

• nara – man, human being
  noun (masculine)
• īśvara – lord, master, ruler
  noun (masculine)