महाभारतः mahābhārataḥ - book-1, chapter-15, verse-8

अगम्यं मनसाप्यन्यैर्नदीवृक्षसमन्वितम् ।
नानापतगसंघैश्च नादितं सुमनोहरैः ॥८॥

8. agamyaṁ manasāpyanyairnadīvṛkṣasamanvitam ,
nānāpatagasaṁghaiśca nāditaṁ sumanoharaiḥ.

8. agamyam manasā api anyaiḥ nadīvṛkṣasamanvitam
nānāpatagasaṅghaiḥ ca nāditam sumanoharaiḥ

8. It was inaccessible even by thought to others, endowed with rivers and trees, and made to resound by various charming flocks of birds.

Words meanings summery:

• अगम्यम् (agamyam) - inaccessible, impassable

• मनसा (manasā) - by the mind, by thought

• अपि (api) - even (even, also, too)

• अन्यैः (anyaiḥ) - by others

• नदीवृक्षसमन्वितम् (nadīvṛkṣasamanvitam) - endowed with rivers and trees

• नानापतगसङ्घैः (nānāpatagasaṅghaiḥ) - by various flocks of birds

• च (ca) - and

• नादितम् (nāditam) - made to resound, filled with sounds

• सुमनोहरैः (sumanoharaiḥ) - by very charming, delightful ones

Words meanings and morphology

अगम्यम् (agamyam) - inaccessible, impassable

(adjective)

Accusative, masculine, singular of agamya

agamya - inaccessible, not to be gone to, improper

potential passive participle

Prefix: a

Root: gam (class 1)

मनसा (manasā) - by the mind, by thought

(noun)

Instrumental, neuter, singular of manas

manas - mind, intellect, thought

अपि (api) - even (even, also, too)

(indeclinable)

अन्यैः (anyaiḥ) - by others

(pronoun)

Instrumental, masculine, plural of anya

anya - other, another, different

नदीवृक्षसमन्वितम् (nadīvṛkṣasamanvitam) - endowed with rivers and trees

(adjective)

Accusative, masculine, singular of nadīvṛkṣasamanvita

nadīvṛkṣasamanvita - accompanied by rivers and trees

Compound type : tatpuruṣa (nadī+vṛkṣa+samanvita)

• nadī – river
  noun (feminine)
• vṛkṣa – tree
  noun (masculine)
• samanvita – accompanied, endowed with, possessed of
  adjective
  past passive participle
  Prefixes: sam+anu
  Root: i (class 2)

नानापतगसङ्घैः (nānāpatagasaṅghaiḥ) - by various flocks of birds

(noun)

Instrumental, masculine, plural of nānāpatagasaṅgha

nānāpatagasaṅgha - collection/flock of various birds

Compound type : tatpuruṣa (nānā+pataga+saṅgha)

• nānā – various, manifold
  indeclinable
• pataga – bird
  noun (masculine)
• saṅgha – collection, flock, multitude
  noun (masculine)

च (ca) - and

(indeclinable)

नादितम् (nāditam) - made to resound, filled with sounds

(adjective)

Accusative, masculine, singular of nādita

nādita - sounded, caused to resound

past passive participle

Root: nad (class 1)

सुमनोहरैः (sumanoharaiḥ) - by very charming, delightful ones

(adjective)

Instrumental, masculine, plural of sumanohara

sumanohara - very charming, delightful, lovely

Compound type : karmadhāraya (su+manohara)

• su – good, well, excellent
  prefix/indeclinable
• manohara – charming, captivating, delightful
  adjective