महाभारतः mahābhārataḥ - book-7, chapter-49, verse-4

द्रोणानीकमसंबाधं मम प्रियचिकीर्षया ।
भित्त्वा व्यूहं प्रविष्टोऽसौ गोमध्यमिव केसरी ॥४॥

4. droṇānīkamasaṁbādhaṁ mama priyacikīrṣayā ,
bhittvā vyūhaṁ praviṣṭo'sau gomadhyamiva kesarī.

4. droṇānīkam asaṃbādham mama priyacikīrṣayā |
bhittvā vyūham praviṣṭaḥ asau gomadhyam iva kesarī

4. asau mama priyacikīrṣayā asaṃbādham droṇānīkam vyūham bhittvā,
gomadhyam iva kesarī,
praviṣṭaḥ.

4. He (Abhimanyu) entered the Drona army formation (vyūha), which was impassable, desiring to do what was dear to me, just like a lion entering a herd of cows after breaking through (their ranks).

Words meanings summery:

• द्रोणानीकम् (droṇānīkam) - Drona's army, Drona's formation

• असंबाधम् (asaṁbādham) - impassable (referring to a dense military formation) (impassable, obstructed)

• मम (mama) - my, to me

• प्रियचिकीर्षया (priyacikīrṣayā) - with the desire to do what is dear, wishing to please

• भित्त्वा (bhittvā) - having broken, having pierced

• व्यूहम् (vyūham) - formation, battle array

• प्रविष्टः (praviṣṭaḥ) - entered

• असौ (asau) - that one, he

• गोमध्यम् (gomadhyam) - midst of cows, herd of cows

• इव (iva) - like, as

• केसरी (kesarī) - lion

Words meanings and morphology

द्रोणानीकम् (droṇānīkam) - Drona's army, Drona's formation

(noun)

Accusative, neuter, singular of droṇānīka

droṇānīka - Drona's army, Drona's military formation

Compound type : ṣaṣṭhī-tatpuruṣa (droṇa+anīka)

• droṇa – Drona (proper name)
  proper noun (masculine)
• anīka – army, host, array, formation
  noun (neuter)

असंबाधम् (asaṁbādham) - impassable (referring to a dense military formation) (impassable, obstructed)

(adjective)

Accusative, neuter, singular of asaṃbādha

asaṁbādha - unobstructed, uncrowded, free, passable; (in military context) dense, impenetrable

Compound type : nañ-tatpuruṣa (a+saṃbādha)

• a – not, un-
  indeclinable
• saṃbādha – crowding, obstruction, narrowness, difficulty
  noun (masculine)
  Prefix: sam
  Root: badh (class 1)

मम (mama) - my, to me

(pronoun)

Genitive, singular of asmad

asmad - I, me

प्रियचिकीर्षया (priyacikīrṣayā) - with the desire to do what is dear, wishing to please

(noun)

Instrumental, feminine, singular of priyacikīrṣā

priyacikīrṣā - desire to do what is dear or agreeable

Compound type : tatpurusha (priya+cikīrṣā)

• priya – dear, beloved, pleasing
  adjective (masculine)
• cikīrṣā – desire to do, intention to act
  noun (feminine)
  Desiderative noun
  Derived from √kṛ (to do) with desiderative suffix -san and feminine suffix -ā
  Root: kṛ (class 8)

भित्त्वा (bhittvā) - having broken, having pierced

(indeclinable)

Absolutive (Gerund)

Derived from √bhid with suffix -tvā

Root: bhid (class 7)

व्यूहम् (vyūham) - formation, battle array

(noun)

Accusative, masculine, singular of vyūha

vyūha - military formation, battle array, arrangement

प्रविष्टः (praviṣṭaḥ) - entered

(adjective)

Nominative, masculine, singular of praviṣṭa

praviṣṭa - entered, gone into

Past Passive Participle

Derived from √viś with prefix pra-

Prefix: pra

Root: viś (class 6)

असौ (asau) - that one, he

(pronoun)

Nominative, masculine, singular of adas

adas - that (demonstrative pronoun)

गोमध्यम् (gomadhyam) - midst of cows, herd of cows

(noun)

Accusative, neuter, singular of gomadhya

gomadhya - midst of cows, herd of cows

Compound type : ṣaṣṭhī-tatpuruṣa (go+madhya)

• go – cow, cattle
  noun (feminine)
• madhya – middle, midst
  noun (neuter)

इव (iva) - like, as

(indeclinable)

केसरी (kesarī) - lion

(noun)

Nominative, masculine, singular of kesarin

kesarin - lion (one having a mane)