महाभारतः mahābhārataḥ - book-3, chapter-292, verse-12

पातु त्वां वरुणो राजा सलिले सलिलेश्वरः ।
अन्तरिक्षेऽन्तरिक्षस्थः पवनः सर्वगस्तथा ॥१२॥

12. pātu tvāṁ varuṇo rājā salile salileśvaraḥ ,
antarikṣe'ntarikṣasthaḥ pavanaḥ sarvagastathā.

12. pātu tvām varuṇaḥ rājā salile salileśvaraḥ |
antarikṣe antarikṣasthaḥ pavanaḥ sarvagaḥ tathā

12. May King Varuṇa, the lord of the waters, protect you while in the water. Similarly, may Pavana (the wind god), the omnipresent one who resides in the sky, protect you in the sky.

Words meanings summery:

• पातु (pātu) - may he protect (may he protect, let him protect)

• त्वाम् (tvām) - you

• वरुणः (varuṇaḥ) - Varuṇa (Varuṇa (a Vedic deity))

• राजा (rājā) - King (king, ruler)

• सलिले (salile) - in the water (in the water, in the waters)

• सलिलेश्वरः (salileśvaraḥ) - the lord of waters (lord of waters, ruler of waters)

• अन्तरिक्षे (antarikṣe) - in the sky (in the sky, in the atmosphere)

• अन्तरिक्षस्थः (antarikṣasthaḥ) - who resides in the sky (abiding in the sky/atmosphere)

• पवनः (pavanaḥ) - Pavana (the wind god) (wind, air; god of wind)

• सर्वगः (sarvagaḥ) - the omnipresent one (all-pervading, omnipresent, going everywhere)

• तथा (tathā) - similarly (so, thus, likewise, and also)

Words meanings and morphology

पातु (pātu) - may he protect (may he protect, let him protect)

(verb)

3rd person , singular, active, imperative (loṭ) of pā

Imperative mood, 3rd singular

Present system (class 2) of the root `pā` (to protect) in the imperative mood.

Root: pā (class 2)

त्वाम् (tvām) - you

(pronoun)

Accusative, singular of yuṣmad

yuṣmad - you

Accusative singular of the 2nd person pronoun.

वरुणः (varuṇaḥ) - Varuṇa (Varuṇa (a Vedic deity))

(proper noun)

Nominative, masculine, singular of varuṇa

varuṇa - Varuṇa (a Vedic deity, god of cosmic order, waters, sky, and justice)

Root: vṛ

राजा (rājā) - King (king, ruler)

(noun)

Nominative, masculine, singular of rājan

rājan - king, ruler, sovereign

Root: rāj

सलिले (salile) - in the water (in the water, in the waters)

(noun)

Locative, neuter, singular of salila

salila - water

Root: sṛ

सलिलेश्वरः (salileśvaraḥ) - the lord of waters (lord of waters, ruler of waters)

(noun)

Nominative, masculine, singular of salileśvara

salileśvara - lord of waters, ruler of waters (an epithet of Varuṇa)

Tatpuruṣa compound.

Compound type : tatpurusha (salila+īśvara)

• salila – water
  noun (neuter)
  Root: sṛ
• īśvara – lord, master, ruler, god
  noun (masculine)
  Derived from the root `īś` (to rule).
  Root: īś (class 2)

अन्तरिक्षे (antarikṣe) - in the sky (in the sky, in the atmosphere)

(noun)

Locative, neuter, singular of antarikṣa

antarikṣa - atmosphere, sky, mid-region

अन्तरिक्षस्थः (antarikṣasthaḥ) - who resides in the sky (abiding in the sky/atmosphere)

(adjective)

Nominative, masculine, singular of antarikṣastha

antarikṣastha - abiding in the atmosphere/sky, aerial

Compound of `antarikṣa` (sky) and `stha` (standing, abiding).

Compound type : tatpurusha (antarikṣa+stha)

• antarikṣa – atmosphere, sky, mid-region
  noun (neuter)
• stha – standing, abiding, situated
  adjective
  Derived from the root `sthā` (to stand).
  Root: sthā (class 1)

पवनः (pavanaḥ) - Pavana (the wind god) (wind, air; god of wind)

(proper noun)

Nominative, masculine, singular of pavana

pavana - wind, air; purified; name of the god of wind

Derived from the root `pū` (to purify, to blow).

Root: pū (class 1)

सर्वगः (sarvagaḥ) - the omnipresent one (all-pervading, omnipresent, going everywhere)

(adjective)

Nominative, masculine, singular of sarvaga

sarvaga - all-pervading, omnipresent, going everywhere

Compound of `sarva` (all) and `ga` (going, moving).

Compound type : tatpurusha (sarva+ga)

• sarva – all, every, whole
  pronoun
• ga – going, moving, dweller
  adjective
  Derived from the root `gam` (to go).
  Root: gam (class 1)

तथा (tathā) - similarly (so, thus, likewise, and also)

(indeclinable)

Correlative adverb.