महाभारतः mahābhārataḥ - book-4, chapter-40, verse-3

स्वस्थो भव महाबुद्धे पश्य मां शत्रुभिः सह ।
युध्यमानं विमर्देऽस्मिन्कुर्वाणं भैरवं महत् ॥३॥

3. svastho bhava mahābuddhe paśya māṁ śatrubhiḥ saha ,
yudhyamānaṁ vimarde'sminkurvāṇaṁ bhairavaṁ mahat.

3. svasthaḥ bhava mahābuddhe paśya mām śatrubhiḥ saha
| yudhyamānam vimarde asmin kurvāṇam bhairavam mahat

3. O great-minded one, be at ease! Behold me fighting with the enemies in this conflict, creating great terror!

Words meanings summery:

• स्वस्थः (svasthaḥ) - at ease, composed (healthy, sound, well; at ease, composed)

• भव (bhava) - be (imperative) (be, become)

• महाबुद्धे (mahābuddhe) - O great-minded one (vocative, addressing Krishna) (O great-minded one, O highly intelligent one)

• पश्य (paśya) - behold, look (imperative) (see, behold, look)

• माम् (mām) - me (object of 'paśya') (me (accusative))

• शत्रुभिः (śatrubhiḥ) - with enemies (by enemies, with enemies)

• सह (saha) - with (with, together with)

• युध्यमानम् (yudhyamānam) - fighting (modifies 'me') (fighting, struggling)

• विमर्दे (vimarde) - in this fierce conflict (in conflict, in struggle, in crushing)

• अस्मिन् (asmin) - in this (modifies 'vimarde') (in this, this)

• कुर्वाणम् (kurvāṇam) - creating (modifies 'me') (doing, making, performing)

• भैरवम् (bhairavam) - terrible, dreadful (modifies the ensuing terror) (terrible, dreadful, formidable)

• महत् (mahat) - great (modifying the terrible action or an implied 'thing') (great, large, important)

Words meanings and morphology

स्वस्थः (svasthaḥ) - at ease, composed (healthy, sound, well; at ease, composed)

(adjective)

Nominative, masculine, singular of svastha

svastha - healthy, well, at ease, self-reliant

From sva (self) + stha (standing, being).

Root: sthā (class 1)

भव (bhava) - be (imperative) (be, become)

(verb)

2nd person , singular, active, imperative (lot) of bhū

Imperative, 2nd person singular, active voice

From root √bhū (to be, become).

Root: bhū (class 1)

महाबुद्धे (mahābuddhe) - O great-minded one (vocative, addressing Krishna) (O great-minded one, O highly intelligent one)

(noun)

Vocative, masculine, singular of mahābuddhi

mahābuddhi - great intellect, great wisdom; one with great intellect

Compound type : bahuvrīhi (mahā+buddhi)

• mahā – great, large, mighty
  adjective (feminine)
• buddhi – intellect, understanding, wisdom, intelligence
  noun (feminine)
  From root √budh (to know, perceive).
  Root: budh (class 1)

पश्य (paśya) - behold, look (imperative) (see, behold, look)

(verb)

2nd person , singular, active, imperative (lot) of dṛś

Imperative, 2nd person singular, active voice. Root √dṛś takes 'paśya' form in present stem.

From root √dṛś (to see).

Root: dṛś (class 1)

माम् (mām) - me (object of 'paśya') (me (accusative))

(pronoun)

Accusative, singular of asmad

asmad - I, me (1st person pronoun)

Accusative singular form of asmad.

शत्रुभिः (śatrubhiḥ) - with enemies (by enemies, with enemies)

(noun)

Instrumental, masculine, plural of śatru

śatru - enemy, foe

Note: Used with 'saha' to mean 'together with'.

सह (saha) - with (with, together with)

(indeclinable)

Note: Preposition.

युध्यमानम् (yudhyamānam) - fighting (modifies 'me') (fighting, struggling)

(adjective)

Accusative, masculine, singular of yudhyamāna

yudhyamāna - fighting, battling, warring

Present Middle Participle

From root √yudh (to fight), present middle participle suffix -māna.

Root: yudh (class 4)

विमर्दे (vimarde) - in this fierce conflict (in conflict, in struggle, in crushing)

(noun)

Locative, masculine, singular of vimarda

vimarda - struggle, conflict, friction, crushing

From vi- + root √mṛd (to crush).

Prefix: vi

Root: mṛd (class 9)

अस्मिन् (asmin) - in this (modifies 'vimarde') (in this, this)

(pronoun)

Locative, masculine, singular of idam

idam - this, this one

Locative singular masculine form of 'idam'.

कुर्वाणम् (kurvāṇam) - creating (modifies 'me') (doing, making, performing)

(adjective)

Accusative, masculine, singular of kurvāṇa

kurvāṇa - doing, making, performing

Present Middle Participle

From root √kṛ (to do, make), present middle participle suffix -āṇa (used with class 8 roots).

Root: kṛ (class 8)

भैरवम् (bhairavam) - terrible, dreadful (modifies the ensuing terror) (terrible, dreadful, formidable)

(adjective)

Accusative, neuter, singular of bhairava

bhairava - terrible, dreadful, formidable; a name of Shiva

From bhīru (fearful) or root √bhī (to fear).

Root: bhī (class 3)

महत् (mahat) - great (modifying the terrible action or an implied 'thing') (great, large, important)

(adjective)

Accusative, neuter, singular of mahat

mahat - great, large, mighty, important; reality, principle

Present Active Participle (from √mah - to be great, or related to √mā - to measure)

Can also function as a noun (e.g., the Great Principle).

Note: Though a participle, 'mahat' is often used as a simple adjective or noun. Here, it is likely an adjective modifying an implied neuter noun like 'terror' or 'deed', or 'bhairavam' itself.