महाभारतः mahābhārataḥ - book-6, chapter-16, verse-17

तथा प्राच्याः प्रतीच्याश्च दाक्षिणात्योत्तरापथाः ।
सर्वशस्त्रास्त्रकुशलास्ते रक्षन्तु पितामहम् ॥१७॥

17. tathā prācyāḥ pratīcyāśca dākṣiṇātyottarāpathāḥ ,
sarvaśastrāstrakuśalāste rakṣantu pitāmaham.

17. tathā prācyāḥ pratīcyāḥ ca dākṣiṇātyottarāpathāḥ
sarvaśastrāstrakusalāḥ te rakṣantu pitāmaham

17. tathā prācyāḥ pratīcyāḥ ca dākṣiṇātyottarāpathāḥ
sarvaśastrāstrakusalāḥ te pitāmaham rakṣantu

17. Likewise, may the Easterners, Westerners, Southerners, and Northerners, who are skilled in all weapons and missiles, protect the grandfather (Bhishma).

Words meanings summery:

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

• प्राच्याः (prācyāḥ) - Easterners

• प्रतीच्याः (pratīcyāḥ) - Westerners

• च (ca) - and

• दाक्षिणात्योत्तरापथाः (dākṣiṇātyottarāpathāḥ) - Southerners and Northerners

• सर्वशस्त्रास्त्रकुसलाः (sarvaśastrāstrakusalāḥ) - skilled in all weapons and missiles

• ते (te) - they

• रक्षन्तु (rakṣantu) - let them protect

• पितामहम् (pitāmaham) - the grandfather (Bhishma) (grandfather)

Words meanings and morphology

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

(indeclinable)

प्राच्याः (prācyāḥ) - Easterners

(noun)

Nominative, masculine, plural of prācya

prācya - eastern, an Easterner

प्रतीच्याः (pratīcyāḥ) - Westerners

(noun)

Nominative, masculine, plural of pratīcya

pratīcya - western, a Westerner

च (ca) - and

(indeclinable)

दाक्षिणात्योत्तरापथाः (dākṣiṇātyottarāpathāḥ) - Southerners and Northerners

(noun)

Nominative, masculine, plural of dākṣiṇātyottarāpatha

dākṣiṇātyottarāpatha - southerners and northerners

Compound type : dvandva (dākṣiṇātya+uttarāpatha)

• dākṣiṇātya – a southerner, belonging to the south
  noun (masculine)
• uttarāpatha – a northerner, belonging to the north
  noun (masculine)

सर्वशस्त्रास्त्रकुसलाः (sarvaśastrāstrakusalāḥ) - skilled in all weapons and missiles

(adjective)

Nominative, masculine, plural of sarvaśastrāstrakuśala

sarvaśastrāstrakuśala - skilled in all weapons and missiles

Compound type : tatpuruṣa (sarva+śastra+astra+kuśala)

• sarva – all, every
  adjective (masculine)
• śastra – weapon (thrown by hand)
  noun (neuter)
• astra – missile (projected by mantra)
  noun (neuter)
• kuśala – skilled, expert
  adjective (masculine)

ते (te) - they

(pronoun)

Nominative, masculine, plural of tad

tad - that, he, she, it

रक्षन्तु (rakṣantu) - let them protect

(verb)

3rd person , plural, active, imperative (loṭ) of rakṣ

Root: rakṣ (class 1)

पितामहम् (pitāmaham) - the grandfather (Bhishma) (grandfather)

(noun)

Accusative, masculine, singular of pitāmaha

pitāmaha - paternal grandfather