महाभारतः mahābhārataḥ - book-7, chapter-161, verse-21

ततस्त्वभ्यवसृत्यैव संग्रामादुत्तरां दिशम् ।
अतिष्ठदाहवे द्रोणो विधूम इव पावकः ॥२१॥

21. tatastvabhyavasṛtyaiva saṁgrāmāduttarāṁ diśam ,
atiṣṭhadāhave droṇo vidhūma iva pāvakaḥ.

21. tataḥ tu abhyavasṛtya eva saṅgrāmāt uttarām
diśam atiṣṭhat āhave droṇaḥ vidhūmaḥ iva pāvakaḥ

21. tataḥ tu droṇaḥ saṅgrāmāt uttarām diśam abhyavasṛtya
eva āhave vidhūmaḥ pāvakaḥ iva atiṣṭhat

21. Then, having indeed retreated from the battle to the northern direction, Drona stood firm in combat like a smokeless fire.

Words meanings summery:

• ततः (tataḥ) - after the previous events, from that situation (then, thence, from there)

• तु (tu) - used for emphasis or continuation (but, indeed, yet)

• अभ्यवसृत्य (abhyavasṛtya) - Drona having moved away from the battle's immediate chaos (having retreated, having withdrawn)

• एव (eva) - emphasizing the action of retreating (indeed, only, just)

• सङ्ग्रामात् (saṅgrāmāt) - away from the battlefield (from the battle, from the combat)

• उत्तराम् (uttarām) - the northern direction (northern, upper, subsequent)

• दिशम् (diśam) - the northern direction (direction, quarter of the sky)

• अतिष्ठत् (atiṣṭhat) - Drona stood firm and prominent (stood, remained, was present)

• आहवे (āhave) - in the midst of the ongoing combat (in battle, in conflict)

• द्रोणः (droṇaḥ) - the great warrior Drona, the commander (Drona (proper noun))

• विधूमः (vidhūmaḥ) - suggesting powerful, unobstructed, and fierce like a fire without obscuring smoke (smokeless, without smoke)

• इव (iva) - indicating a comparison (as if, like)

• पावकः (pāvakaḥ) - a blazing, pure fire (fire, purificatory)

Words meanings and morphology

ततः (tataḥ) - after the previous events, from that situation (then, thence, from there)

(indeclinable)

adverbial suffix tas from tad

तु (tu) - used for emphasis or continuation (but, indeed, yet)

(indeclinable)

particle

अभ्यवसृत्य (abhyavasṛtya) - Drona having moved away from the battle's immediate chaos (having retreated, having withdrawn)

(indeclinable)

Absolutive (Gerund)

formed from abhi + ava + root √sṛ (to go, move) + suffix lyap

Prefixes: abhi+ava

Root: √sṛ (class 1)

एव (eva) - emphasizing the action of retreating (indeed, only, just)

(indeclinable)

particle for emphasis

सङ्ग्रामात् (saṅgrāmāt) - away from the battlefield (from the battle, from the combat)

(noun)

Ablative, masculine, singular of saṅgrāma

saṅgrāma - battle, war, combat

sam + grāma (collection, village) indicating conflict of groups.

Note: Indicates separation from the battle.

उत्तराम् (uttarām) - the northern direction (northern, upper, subsequent)

(adjective)

Accusative, feminine, singular of uttarā

uttarā - northern, upper, later, higher

feminine form of uttara

Note: Qualifies diśam.

दिशम् (diśam) - the northern direction (direction, quarter of the sky)

(noun)

Accusative, feminine, singular of diś

diś - direction, quarter, region

Note: Object of motion.

अतिष्ठत् (atiṣṭhat) - Drona stood firm and prominent (stood, remained, was present)

(verb)

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

Imperfect (Laṅ)

3rd person singular, Parasmaipada

Prefix: ati

Root: √sthā (class 1)

Note: The ṣ comes from s due to ṣṭh (retroflexion).

आहवे (āhave) - in the midst of the ongoing combat (in battle, in conflict)

(noun)

Locative, masculine, singular of āhava

āhava - battle, war, combat, challenge

from ā + root √hu (to call) or √hav (to offer). More likely related to 'challenge' or 'summon'.

Prefix: ā

Root: √hu (class 3)

Note: Indicates the place of action.

द्रोणः (droṇaḥ) - the great warrior Drona, the commander (Drona (proper noun))

(proper noun)

Nominative, masculine, singular of droṇa

droṇa - Drona (name of a warrior and teacher)

Note: Subject of atiṣṭhat.

विधूमः (vidhūmaḥ) - suggesting powerful, unobstructed, and fierce like a fire without obscuring smoke (smokeless, without smoke)

(adjective)

Nominative, masculine, singular of vidhūma

vidhūma - smokeless, clear, pure

vi (without) + dhūma (smoke)

Compound type : bahuvrīhi (vi+dhūma)

• vi – without, free from
  indeclinable
• dhūma – smoke, vapor
  noun (masculine)

Note: Qualifies pāvakaḥ.

इव (iva) - indicating a comparison (as if, like)

(indeclinable)

particle of comparison

पावकः (pāvakaḥ) - a blazing, pure fire (fire, purificatory)

(noun)

Nominative, masculine, singular of pāvaka

pāvaka - fire, pure, purifying

from root √pū (to purify) + suffix ka

Root: √pū (class 1)

Note: Compared to Drona.