महाभारतः mahābhārataḥ - book-4, chapter-64, verse-15

आचार्यो वृष्णिवीराणां पाण्डवानां च यो द्विजः ।
सर्वक्षत्रस्य चाचार्यः सर्वशस्त्रभृतां वरः ।
तेन द्रोणेन ते तात कथमासीत्समागमः ॥१५॥

15. ācāryo vṛṣṇivīrāṇāṁ pāṇḍavānāṁ ca yo dvijaḥ ,
sarvakṣatrasya cācāryaḥ sarvaśastrabhṛtāṁ varaḥ ,
tena droṇena te tāta kathamāsītsamāgamaḥ.

15. ācāryaḥ vṛṣṇivīrāṇām pāṇḍavānām ca
yaḥ dvijaḥ sarvakṣatrasya ca ācāryaḥ
sarvaśastrabhṛtām varaḥ tena
droṇeṇa te tāta katham āsīt samāgamaḥ

15. He who is the teacher of the Vṛṣṇi heroes and the Pāṇḍavas, a brahmin (dvija), and indeed the preceptor of all kṣatriyas and the foremost among all who bear arms—dear son, how did you encounter Droṇa?

Words meanings summery:

• आचार्यः (ācāryaḥ) - teacher, preceptor

• वृष्णिवीराणाम् (vṛṣṇivīrāṇām) - of the Vṛṣṇi heroes

• पाण्डवानाम् (pāṇḍavānām) - of the Pāṇḍavas

• च (ca) - and

• यः (yaḥ) - who, he who

• द्विजः (dvijaḥ) - brahmin (twice-born, brahmin)

• सर्वक्षत्रस्य (sarvakṣatrasya) - of all kṣatriyas, of the entire warrior class

• च (ca) - and

• आचार्यः (ācāryaḥ) - teacher, preceptor

• सर्वशस्त्रभृताम् (sarvaśastrabhṛtām) - of all weapon-bearers

• वरः (varaḥ) - best, excellent

• तेन (tena) - by him, with him

• द्रोणेण (droṇeṇa) - by Droṇa, the revered teacher of military arts (by Droṇa)

• ते (te) - to you, your

• तात (tāta) - dear son, dear one

• कथम् (katham) - how?

• आसीत् (āsīt) - was, happened

• समागमः (samāgamaḥ) - encounter, meeting

Words meanings and morphology

आचार्यः (ācāryaḥ) - teacher, preceptor

(noun)

Nominative, masculine, singular of ācārya

ācārya - teacher, preceptor, master

Prefix: ā

Root: car

वृष्णिवीराणाम् (vṛṣṇivīrāṇām) - of the Vṛṣṇi heroes

(noun)

Genitive, masculine, plural of vṛṣṇivīra

vṛṣṇivīra - hero of the Vṛṣṇis

Compound type : ṣaṣṭhī-tatpuruṣa (vṛṣṇi+vīra)

• vṛṣṇi – Vṛṣṇi (name of a Yadava clan)
  proper noun (masculine)
• vīra – hero, brave man
  noun (masculine)

पाण्डवानाम् (pāṇḍavānām) - of the Pāṇḍavas

(proper noun)

Genitive, masculine, plural of pāṇḍava

pāṇḍava - a descendant of Pāṇḍu, the Pāṇḍavas

च (ca) - and

(indeclinable)

यः (yaḥ) - who, he who

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what

द्विजः (dvijaḥ) - brahmin (twice-born, brahmin)

(noun)

Nominative, masculine, singular of dvija

dvija - twice-born (Brahmin, Kṣatriya, Vaiśya), bird, tooth

Derived from dvi (two) and jan (to be born).

Compound type : bahuvrīhi (dvi+ja)

• dvi – two
  indeclinable
• ja – born, produced from
  adjective (masculine)
  Derived from root jan (to be born).
  Root: jan

सर्वक्षत्रस्य (sarvakṣatrasya) - of all kṣatriyas, of the entire warrior class

(noun)

Genitive, masculine, singular of sarvakṣatra

sarvakṣatra - all kṣatriyas, the entire warrior class

Compound type : karmadhāraya (sarva+kṣatra)

• sarva – all, every, whole
  adjective (masculine)
• kṣatra – warrior, member of the kṣatriya class
  noun (masculine)

च (ca) - and

(indeclinable)

आचार्यः (ācāryaḥ) - teacher, preceptor

(noun)

Nominative, masculine, singular of ācārya

ācārya - teacher, preceptor, master

Prefix: ā

Root: car

सर्वशस्त्रभृताम् (sarvaśastrabhṛtām) - of all weapon-bearers

(noun)

Genitive, masculine, plural of sarvaśastrabhṛt

sarvaśastrabhṛt - one who bears all weapons, all weapon-bearers

Compound type : tatpuruṣa (sarva+śastrabhṛt)

• sarva – all, every, whole
  adjective (masculine)
• śastrabhṛt – weapon-bearer, warrior
  noun (masculine)

वरः (varaḥ) - best, excellent

(adjective)

Nominative, masculine, singular of vara

vara - best, excellent, superior

तेन (tena) - by him, with him

(pronoun)

Instrumental, masculine, singular of tad

tad - that, he, it

द्रोणेण (droṇeṇa) - by Droṇa, the revered teacher of military arts (by Droṇa)

(proper noun)

Instrumental, masculine, singular of droṇa

droṇa - Droṇa (proper name, the guru of the Pāṇḍavas and Kauravas)

ते (te) - to you, your

(pronoun)

singular of yuṣmad

yuṣmad - you

Note: Here functioning as genitive, 'your encounter'

तात (tāta) - dear son, dear one

(noun)

Vocative, masculine, singular of tāta

tāta - father, dear one, son (vocative of affection)

कथम् (katham) - how?

(indeclinable)

आसीत् (āsīt) - was, happened

(verb)

3rd person , singular, active, past imperfect (laṅ) of as

Root: as (class 2)

समागमः (samāgamaḥ) - encounter, meeting

(noun)

Nominative, masculine, singular of samāgama

samāgama - meeting, conjunction, encounter

Prefixes: sam+ā

Root: gam