महाभारतः mahābhārataḥ - book-9, chapter-3, verse-38

प्रमुखस्थे तदा कर्णे बलं पाण्डवरक्षितम् ।
दुरासदं तथा गुप्तं गूढं गाण्डीवधन्वना ॥३८॥

38. pramukhasthe tadā karṇe balaṁ pāṇḍavarakṣitam ,
durāsadaṁ tathā guptaṁ gūḍhaṁ gāṇḍīvadhanvanā.

38. pramukhasthte tadā karṇe balam pāṇḍavarakṣitam
durāsadam tathā guptam gūḍham gāṇḍīvadhanvanā

38. tadā karṇe pramukhasthte pāṇḍavarakṣitam balam
durāsadam tathā gāṇḍīvadhanvanā guptam gūḍham

38. Even when Karna was at the forefront, the army protected by the Pandavas was difficult to approach, well-guarded, and concealed by Arjuna, the wielder of the Gandiva bow (gāṇḍīvadhanvan).

Words meanings summery:

• प्रमुखस्थ्ते (pramukhasthte) - when Karna was prominent (standing at the front, prominent, foremost)

• तदा (tadā) - then, at that time

• कर्णे (karṇe) - Karna (locative case, implying 'when Karna was')

• बलम् (balam) - army, force, strength

• पाण्डवरक्षितम् (pāṇḍavarakṣitam) - protected by the Pandavas

• दुरासदम् (durāsadam) - difficult to approach, unconquerable, inaccessible

• तथा (tathā) - and, thus, so also

• गुप्तम् (guptam) - protected, guarded, concealed

• गूढम् (gūḍham) - hidden, concealed, secret

• गाण्डीवधन्वना (gāṇḍīvadhanvanā) - by the wielder of the Gandiva bow, by Arjuna

Words meanings and morphology

प्रमुखस्थ्ते (pramukhasthte) - when Karna was prominent (standing at the front, prominent, foremost)

(adjective)

Locative, masculine, singular of pramukhastha

pramukhastha - standing at the front, prominent, foremost, chief

Compound type : tatpuruṣa (pra+mukha+stha)

• pra – forth, forward, before, in front
  indeclinable
• mukha – face, mouth, front, chief
  noun (neuter)
• stha – standing, staying, situated, being in
  adjective
  Derived from root sthā (to stand)
  Root: sthā (class 1)

तदा (tadā) - then, at that time

(indeclinable)

कर्णे (karṇe) - Karna (locative case, implying 'when Karna was')

(proper noun)

Locative, masculine, singular of karṇa

karṇa - Karna (a great warrior in the Mahabharata)

बलम् (balam) - army, force, strength

(noun)

Nominative, neuter, singular of bala

bala - strength, power, force, army, military

पाण्डवरक्षितम् (pāṇḍavarakṣitam) - protected by the Pandavas

(adjective)

Nominative, neuter, singular of pāṇḍavarakṣita

pāṇḍavarakṣita - protected by the Pandavas

Compound type : tatpuruṣa (pāṇḍava+rakṣita)

• pāṇḍava – a descendant of Pandu, a Pandava
  proper noun (masculine)
• rakṣita – protected, guarded, preserved
  adjective
  Past Passive Participle
  Derived from root rakṣ (to protect)
  Root: rakṣ (class 1)

दुरासदम् (durāsadam) - difficult to approach, unconquerable, inaccessible

(adjective)

Nominative, neuter, singular of durāsada

durāsada - difficult to approach or reach, inaccessible, invincible, insurmountable

Compound type : pradi-tatpuruṣa (dur+āsada)

• dur – difficult, bad, hard, ill
  indeclinable
• āsada – approach, obtainment
  noun (masculine)
  Derived from root sad (to go, to sit) with prefix ā
  Prefix: ā
  Root: sad (class 1)

तथा (tathā) - and, thus, so also

(indeclinable)

गुप्तम् (guptam) - protected, guarded, concealed

(adjective)

Nominative, neuter, singular of gupta

gupta - protected, guarded, hidden, secret

Past Passive Participle

Derived from root gup (to protect, to hide)

Root: gup (class 1)

गूढम् (gūḍham) - hidden, concealed, secret

(adjective)

Nominative, neuter, singular of gūḍha

gūḍha - hidden, concealed, secret, obscure

Past Passive Participle

Derived from root guh (to hide)

Root: guh (class 1)

गाण्डीवधन्वना (gāṇḍīvadhanvanā) - by the wielder of the Gandiva bow, by Arjuna

(noun)

Instrumental, masculine, singular of gāṇḍīvadhanvan

gāṇḍīvadhanvan - wielder of the Gandiva bow (an epithet of Arjuna)

Compound type : bahuvrīhi (gāṇḍīva+dhanvan)

• gāṇḍīva – Gandiva (the name of Arjuna's bow)
  proper noun (neuter)
• dhanvan – bow, archer
  noun (neuter)