वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-1, chapter-35, verse-25

स गत्वा तप आतिष्ठत् पार्श्वे तस्योत्तरे गिरेः ।
हिमवत्प्रभवे शृङ्गे सह देव्या महेश्वरः ॥२५॥

25. sa gatvā tapa ātiṣṭhat pārśve tasyottare gireḥ ,
himavatprabhave śṛṅge saha devyā maheśvaraḥ.

25. sa gatvā tapaḥ ātiṣṭhat pārśve tasya uttare
gireḥ himavatprabhave śṛṅge saha devyā maheśvaraḥ

25. Maheśvara (Maheśvara), accompanied by the goddess, went and undertook severe penance (tapas) on a peak originating from Himavat, specifically on the northern side of that mountain.

Words meanings summery:

• स (sa) - He (Maheśvara) (he, that)

• गत्वा (gatvā) - having gone

• तपः (tapaḥ) - penance, austerity, spiritual discipline (tapas)

• आतिष्ठत् (ātiṣṭhat) - undertook/performed (penance) (undertook, performed, stayed)

• पार्श्वे (pārśve) - on the side

• तस्य (tasya) - of that (mountain) (of that)

• उत्तरे (uttare) - northern, on the northern side

• गिरेः (gireḥ) - of the mountain

• हिमवत्प्रभवे (himavatprabhave) - originating from Himavat (the Himalayas), born of Himavat

• शृङ्गे (śṛṅge) - on the peak, on the summit

• सह (saha) - with, together with

• देव्या (devyā) - with the goddess (Pārvatī) (with the goddess)

• महेश्वरः (maheśvaraḥ) - Maheśvara (the Great Lord), a name of Śiva

Words meanings and morphology

स (sa) - He (Maheśvara) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

Note: Refers to Maheśvara.

गत्वा (gatvā) - having gone

(indeclinable)

Root: gam (class 1)

तपः (tapaḥ) - penance, austerity, spiritual discipline (tapas)

(noun)

Accusative, neuter, singular of tapas

tapas - penance, austerity, spiritual discipline, heat

आतिष्ठत् (ātiṣṭhat) - undertook/performed (penance) (undertook, performed, stayed)

(verb)

3rd person , singular, active, imperfect (laṅ) of sthā

Prefix: ā

Root: sthā (class 1)

पार्श्वे (pārśve) - on the side

(noun)

Locative, neuter, singular of pārśva

pārśva - side, flank

तस्य (tasya) - of that (mountain) (of that)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

Note: Refers to 'gireḥ'.

उत्तरे (uttare) - northern, on the northern side

(adjective)

Locative, neuter, singular of uttara

uttara - northern, upper, later, subsequent

Note: Agrees with 'pārśve'.

गिरेः (gireḥ) - of the mountain

(noun)

Genitive, masculine, singular of giri

giri - mountain, hill

हिमवत्प्रभवे (himavatprabhave) - originating from Himavat (the Himalayas), born of Himavat

(adjective)

Locative, neuter, singular of himavatprabhava

himavatprabhava - originating from Himavat, born of Himavat

Compound type : tatpuruṣa (himavat+prabhava)

• himavat – Himavat (the Himalayas), snowy
  proper noun (masculine)
• prabhava – origin, source, birth, power
  noun (masculine)

Note: Agrees with 'śṛṅge'.

शृङ्गे (śṛṅge) - on the peak, on the summit

(noun)

Locative, neuter, singular of śṛṅga

śṛṅga - horn, peak, summit, crest

सह (saha) - with, together with

(indeclinable)

Note: Governs the instrumental case.

देव्या (devyā) - with the goddess (Pārvatī) (with the goddess)

(noun)

Instrumental, feminine, singular of devī

devī - goddess, divine lady, queen

Note: Used with 'saha'.

महेश्वरः (maheśvaraḥ) - Maheśvara (the Great Lord), a name of Śiva

(proper noun)

Nominative, masculine, singular of maheśvara

maheśvara - great lord, a name of Śiva

Compound type : karma dhāraya (mahā+īśvara)

• mahā – great, large, mighty
  adjective
• īśvara – lord, master, ruler, god
  noun (masculine)

Note: The subject of the sentence.