वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-7, chapter-4, verse-20

संध्यादुहितरं सो ऽथ संध्यातुल्यां प्रभावतः ।
वरयामास पुत्रार्थं हेती राक्षसपुंगवः ॥२०॥

20. saṃdhyāduhitaraṃ so'tha saṃdhyātulyāṃ prabhāvataḥ ,
varayāmāsa putrārthaṃ hetī rākṣasapuṃgavaḥ.

20. sandhyāduhitaram saḥ atha sandhyātulyām prabhāvataḥ
varayāmāsa putrārtham hetiḥ rākṣasapuṅgavaḥ

20. hetiḥ rākṣasapuṅgavaḥ saḥ atha prabhāvataḥ
sandhyātulyām sandhyāduhitaram putrārtham varayāmāsa

20. Then Heti, the chief of the rākṣasas (demons), desired to marry Sandhyā's daughter, who was equal to Sandhyā in splendor, for the sake of a son.

Words meanings summery:

• सन्ध्यादुहितरम् (sandhyāduhitaram) - Sandhyā's daughter, the daughter of Sandhyā

• सः (saḥ) - referring to Heti (he)

• अथ (atha) - then, now, thereupon

• सन्ध्यातुल्याम् (sandhyātulyām) - equal to Sandhyā, like Sandhyā

• प्रभावतः (prabhāvataḥ) - in terms of splendor or influence (by power, by splendor, in might)

• वरयामास (varayāmāsa) - desired to marry, chose, took as wife

• पुत्रार्थम् (putrārtham) - for the sake of a son, for a son

• हेतिः (hetiḥ) - Name of a rākṣasa chief (Heti)

• राक्षसपुङ्गवः (rākṣasapuṅgavaḥ) - chief of rākṣasas, best among rākṣasas

Words meanings and morphology

सन्ध्यादुहितरम् (sandhyāduhitaram) - Sandhyā's daughter, the daughter of Sandhyā

(noun)

Accusative, feminine, singular of sandhyāduhitṛ

sandhyāduhitṛ - daughter of Sandhyā

Compound type : ṣaṣṭhī-tatpuruṣa (sandhyā+duhitṛ)

• sandhyā – twilight; name of a divine being/goddess
  proper noun (feminine)
• duhitṛ – daughter
  noun (feminine)

सः (saḥ) - referring to Heti (he)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

अथ (atha) - then, now, thereupon

(indeclinable)

सन्ध्यातुल्याम् (sandhyātulyām) - equal to Sandhyā, like Sandhyā

(adjective)

Accusative, feminine, singular of sandhyātulyā

sandhyātulyā - equal to Sandhyā

Compound type : tatpuruṣa (sandhyā+tulya)

• sandhyā – twilight; name of a divine being/goddess
  proper noun (feminine)
• tulya – equal, similar, comparable
  adjective (masculine)

प्रभावतः (prabhāvataḥ) - in terms of splendor or influence (by power, by splendor, in might)

(indeclinable)

Derived with the tasil (तः) suffix from prabhāva, functioning adverbially.

Prefix: pra

Root: bhū (class 1)

वरयामास (varayāmāsa) - desired to marry, chose, took as wife

(verb)

3rd person , singular, active, perfect (Lit) of vṛ

Periphrastic perfect

Formed from the root vṛ (causative varaya) with the periphrastic perfect suffix āmāsa.

Root: vṛ (class 9)

पुत्रार्थम् (putrārtham) - for the sake of a son, for a son

(noun)

Accusative, masculine, singular of putrārtha

putrārtha - purpose of a son, for the sake of a son

Compound type : ṣaṣṭhī-tatpuruṣa (putra+artha)

• putra – son
  noun (masculine)
• artha – purpose, aim, sake, meaning
  noun (masculine)

Note: Used adverbially to express purpose.

हेतिः (hetiḥ) - Name of a rākṣasa chief (Heti)

(proper noun)

Nominative, masculine, singular of heti

heti - Heti (proper name of a rākṣasa)

राक्षसपुङ्गवः (rākṣasapuṅgavaḥ) - chief of rākṣasas, best among rākṣasas

(noun)

Nominative, masculine, singular of rākṣasapuṅgava

rākṣasapuṅgava - chief among rākṣasas (demons)

Compound type : ṣaṣṭhī-tatpuruṣa (rākṣasa+puṅgava)

• rākṣasa – demon, rākṣasa (a class of mythological beings)
  noun (masculine)
• puṅgava – bull (used metaphorically for 'best', 'chief', 'excellent one')
  noun (masculine)