महाभारतः mahābhārataḥ - book-7, chapter-78, verse-12

अस्मिन्नन्तर्हितं कृष्ण त्रैलोक्यमपि वर्मणि ।
एको द्रोणो हि वेदैतदहं तस्माच्च सत्तमात् ॥१२॥

12. asminnantarhitaṁ kṛṣṇa trailokyamapi varmaṇi ,
eko droṇo hi vedaitadahaṁ tasmācca sattamāt.

12. asmin antarbhitam kṛṣṇa trailokyam api varmaṇi
ekaḥ droṇaḥ hi veda etat aham tasmāt ca sattamāt

12. kṛṣṇa,
asmin varmaṇi trailokyam api antarbhitam.
ekaḥ droṇaḥ hi etat veda,
ca aham tasmāt sattamāt (veda).

12. O Kṛṣṇa, within this armor (varmaṇi), even the three worlds are contained. Indeed, only Droṇa knows this, and I have learned it from that most excellent one (Droṇa).

Words meanings summery:

• अस्मिन् (asmin) - in this (armor) (in this (masculine/neuter))

• अन्तर्भितम् (antarbhitam) - contained, hidden within

• कृष्ण (kṛṣṇa) - O Kṛṣṇa (Arjuna addressing his charioteer and friend) (O Kṛṣṇa)

• त्रैलोक्यम् (trailokyam) - the three worlds

• अपि (api) - even (also, even, too)

• वर्मणि (varmaṇi) - in this armor (in/on the armor)

• एकः (ekaḥ) - only (Droṇa) (one, alone, only)

• द्रोणः (droṇaḥ) - Droṇācārya (Droṇa)

• हि (hi) - indeed (indeed, for, because)

• वेद (veda) - he knows

• एतत् (etat) - this (fact about the armor) (this (neuter))

• अहम् (aham) - I

• तस्मात् (tasmāt) - from that excellent one (Droṇa) (from him, from that)

• च (ca) - and (and, also)

• सत्तमात् (sattamāt) - from that most excellent one (Droṇa) (from the most excellent)

Words meanings and morphology

अस्मिन् (asmin) - in this (armor) (in this (masculine/neuter))

(pronoun)

Locative, neuter, singular of idam

idam - this

Demonstrative pronoun.

Note: Refers to `varmaṇi`.

अन्तर्भितम् (antarbhitam) - contained, hidden within

(adjective)

Nominative, neuter, singular of antarbhita

antarbhita - contained, hidden, concealed within

Past Passive Participle

From root √dhā (to place) with prefix antar (within).

Prefix: antar

Root: dhā (class 3)

Note: Describes `trailokyam`.

कृष्ण (kṛṣṇa) - O Kṛṣṇa (Arjuna addressing his charioteer and friend) (O Kṛṣṇa)

(proper noun)

Vocative, masculine, singular of kṛṣṇa

kṛṣṇa - Kṛṣṇa (a proper name); black, dark

त्रैलोक्यम् (trailokyam) - the three worlds

(noun)

Nominative, neuter, singular of trailokya

trailokya - the three worlds (heaven, earth, and netherworld)

Dvigu compound.

Compound type : dvigu (tri+loka)

• tri – three
  numeral
• loka – world, realm, people
  noun (masculine)
  Root: lok (class 10)

Note: It's technically 3 worlds, but grammatically singular/collective in form.

अपि (api) - even (also, even, too)

(indeclinable)

Particle.

वर्मणि (varmaṇi) - in this armor (in/on the armor)

(noun)

Locative, neuter, singular of varman

varman - armor, shield, protection

Root √vṛ (to cover, protect)

Root: vṛ (class 9)

एकः (ekaḥ) - only (Droṇa) (one, alone, only)

(adjective)

Nominative, masculine, singular of eka

eka - one, single, alone, unique

Numeral or indefinite pronoun/adjective.

Note: Qualifies `droṇaḥ`.

द्रोणः (droṇaḥ) - Droṇācārya (Droṇa)

(proper noun)

Nominative, masculine, singular of droṇa

droṇa - Droṇa (a proper name); bucket, trough

हि (hi) - indeed (indeed, for, because)

(indeclinable)

Particle expressing affirmation or cause.

वेद (veda) - he knows

(verb)

3rd person , singular, active, present (liṭ) of vid

Perfect tense (reduplicated present), 3rd singular active

From root √vid (to know).

Root: vid (class 2)

एतत् (etat) - this (fact about the armor) (this (neuter))

(pronoun)

Accusative, neuter, singular of etad

etad - this

Demonstrative pronoun.

Note: Object of `veda`.

अहम् (aham) - I

(pronoun)

Nominative, singular of asmad

asmad - I, we

First person pronoun.

Note: Refers to Arjuna.

तस्मात् (tasmāt) - from that excellent one (Droṇa) (from him, from that)

(pronoun)

Ablative, masculine, singular of tad

tad - that, he, she, it

Demonstrative pronoun.

Note: Refers to `sattamāt` (Droṇa).

च (ca) - and (and, also)

(indeclinable)

Conjunction.

सत्तमात् (sattamāt) - from that most excellent one (Droṇa) (from the most excellent)

(adjective)

Ablative, masculine, singular of sattama

sattama - most excellent, best, noblest

Superlative degree of `sat` (good, existing).

Root: as (class 2)

Note: Qualifies Droṇa.