महाभारतः mahābhārataḥ - book-6, chapter-21, verse-4

अक्षोभ्योऽयमभेद्यश्च भीष्मेणामित्रकर्शिना ।
कल्पितः शास्त्रदृष्टेन विधिना भूरितेजसा ॥४॥

4. akṣobhyo'yamabhedyaśca bhīṣmeṇāmitrakarśinā ,
kalpitaḥ śāstradṛṣṭena vidhinā bhūritejasā.

4. akṣobhyaḥ ayam abhedyaḥ ca bhīṣmeṇa amitrakarśinā
kalpitaḥ śāstradṛṣṭena vidhinā bhūritejasā

4. ayam akṣobhyaḥ ca abhedyaḥ amitrakarśinā
bhūritejasā bhīṣmeṇa śāstradṛṣṭena vidhinā kalpitaḥ

4. This battle array, unshakeable and impenetrable, has been designed by Bhishma, who devastates his foes and possesses immense prowess (tejas), according to the methods prescribed in the scriptures.

Words meanings summery:

• अक्षोभ्यः (akṣobhyaḥ) - unshakeable, impregnable

• अयम् (ayam) - this (formation) (this (one))

• अभेद्यः (abhedyaḥ) - impenetrable, unbreakable

• च (ca) - and, also

• भीष्मेण (bhīṣmeṇa) - by Bhishma

• अमित्रकर्शिना (amitrakarśinā) - by the destroyer of enemies

• कल्पितः (kalpitaḥ) - formed, arranged, constructed

• शास्त्रदृष्टेन (śāstradṛṣṭena) - by what is seen in scriptures, according to scriptural injunctions

• विधिना (vidhinā) - by rule, by method, by ordinance

• भूरितेजसा (bhūritejasā) - by the one of great prowess, of immense energy

Words meanings and morphology

अक्षोभ्यः (akṣobhyaḥ) - unshakeable, impregnable

(adjective)

Nominative, masculine, singular of akṣobhya

akṣobhya - not to be shaken, impregnable, firm, steady

Gerundive

negation prefix 'a-' + gerundive of root 'kṣubh'

Compound type : nañ-tatpuruṣa (a+kṣobhya)

• a – not, un-
  indeclinable
  negation prefix
• kṣobhya – to be shaken, agitable
  adjective
  Gerundive
  Gerundive from root 'kṣubh'
  Root: kṣubh (class 1)

अयम् (ayam) - this (formation) (this (one))

(pronoun)

Nominative, masculine, singular of idam

idam - this, this here

अभेद्यः (abhedyaḥ) - impenetrable, unbreakable

(adjective)

Nominative, masculine, singular of abhedya

abhedya - impenetrable, not to be broken, indivisible

Gerundive

negation prefix 'a-' + gerundive of root 'bhid'

Compound type : nañ-tatpuruṣa (a+bhedya)

• a – not, un-
  indeclinable
  negation prefix
• bhedya – to be broken, penetrable
  adjective
  Gerundive
  Gerundive from root 'bhid'
  Root: bhid (class 7)

च (ca) - and, also

(indeclinable)

भीष्मेण (bhīṣmeṇa) - by Bhishma

(proper noun)

Instrumental, masculine, singular of bhīṣma

bhīṣma - Bhishma (name of a Kuru warrior)

अमित्रकर्शिना (amitrakarśinā) - by the destroyer of enemies

(adjective)

Instrumental, masculine, singular of amitrakarśin

amitrakarśin - destroyer of enemies, one who emaciates foes

agent noun/adjective

compound of 'amitra' (enemy) and 'karśin' (emaciator/destroyer)

Compound type : ṣaṣṭhī-tatpuruṣa (amitra+karśin)

• amitra – enemy, not a friend
  noun (masculine)
• karśin – one who makes thin, emaciates, weakens, destroys
  adjective (masculine)
  agent noun suffix '-in'
  from causative of root 'kṛś'
  Root: kṛś (class 10)

कल्पितः (kalpitaḥ) - formed, arranged, constructed

(adjective)

Nominative, masculine, singular of kalpita

kalpita - made, prepared, formed, arranged, constructed

Past Passive Participle

formed from root 'kḷp' with suffix '-ita'

Root: kḷp (class 10)

शास्त्रदृष्टेन (śāstradṛṣṭena) - by what is seen in scriptures, according to scriptural injunctions

(adjective)

Instrumental, masculine, singular of śāstradṛṣṭa

śāstradṛṣṭa - seen in the scriptures, taught by sacred texts

compound of 'śāstra' and 'dṛṣṭa'

Compound type : saptamī-tatpuruṣa (śāstra+dṛṣṭa)

• śāstra – sacred text, scripture, treatise
  noun (neuter)
• dṛṣṭa – seen, beheld, observed
  adjective
  Past Passive Participle
  from root 'dṛś' with suffix '-ta'
  Root: dṛś (class 1)

Note: Agrees with 'vidhinā'

विधिना (vidhinā) - by rule, by method, by ordinance

(noun)

Instrumental, masculine, singular of vidhi

vidhi - rule, method, ordinance, injunction, fate

भूरितेजसा (bhūritejasā) - by the one of great prowess, of immense energy

(adjective)

Instrumental, masculine, singular of bhūritejas

bhūritejas - possessing great brilliance, immense energy, or power (tejas)

Compound type : bahuvrīhi (bhūri+tejas)

• bhūri – abundant, much, great, powerful
  adjective
• tejas – sharpness, brilliance, splendor, energy, power, spiritual power (tejas)
  noun (neuter)

Note: Agrees with 'bhīṣmeṇa'