महाभारतः mahābhārataḥ - book-1, chapter-40, verse-3

सीमन्तमिव कुर्वाणं नभसः पद्मवर्चसम् ।
तक्षकं पन्नगश्रेष्ठं भृशं शोकपरायणाः ॥३॥

3. sīmantamiva kurvāṇaṁ nabhasaḥ padmavarcasam ,
takṣakaṁ pannagaśreṣṭhaṁ bhṛśaṁ śokaparāyaṇāḥ.

3. sīmantam iva kurvāṇam nabhasaḥ padmavarcasam |
takṣakam pannagaśreṣṭham bhṛśam śokaparāyaṇāḥ

3. Deeply immersed in sorrow, they beheld Takṣaka, the best of serpents, who, brilliant like a lotus, was creating a parting line, as it were, in the sky.

Words meanings summery:

• सीमन्तम् (sīmantam) - a parting line (in the sky) (parting line, boundary)

• इव (iva) - like, as if, as

• कुर्वाणम् (kurvāṇam) - creating (doing, making, performing)

• नभसः (nabhasaḥ) - of the sky, of the atmosphere

• पद्मवर्चसम् (padmavarcasam) - brilliant like a lotus (having the brilliance of a lotus)

• तक्षकम् (takṣakam) - Takṣaka (name of a nāga)

• पन्नगश्रेष्ठम् (pannagaśreṣṭham) - the foremost serpent (best of serpents)

• भृशम् (bhṛśam) - deeply (greatly, exceedingly, deeply)

• शोकपरायणाः (śokaparāyaṇāḥ) - immersed in sorrow (devoted to sorrow, immersed in grief)

Words meanings and morphology

सीमन्तम् (sīmantam) - a parting line (in the sky) (parting line, boundary)

(noun)

Accusative, masculine, singular of sīmanta

sīmanta - parting of the hair; boundary, limit; forehead

इव (iva) - like, as if, as

(indeclinable)

कुर्वाणम् (kurvāṇam) - creating (doing, making, performing)

(nominal form)

Accusative, masculine, singular of kṛ

kṛ - to do, to make, to perform, to create

Root: kṛ (class 8)

नभसः (nabhasaḥ) - of the sky, of the atmosphere

(noun)

Genitive, neuter, singular of nabhas

nabhas - sky, atmosphere, firmament, cloud

पद्मवर्चसम् (padmavarcasam) - brilliant like a lotus (having the brilliance of a lotus)

(adjective)

Accusative, masculine, singular of padmavarcas

padmavarcas - having the brilliance or luster of a lotus

Compound type : bahuvrīhi (padma+varcas)

• padma – lotus; a specific numerical value
  noun (neuter)
• varcas – brilliance, luster, energy, vitality
  noun (neuter)

तक्षकम् (takṣakam) - Takṣaka (name of a nāga)

(noun)

Accusative, masculine, singular of takṣaka

takṣaka - Takṣaka (a chief of the nāgas or serpents); a carpenter; a kind of snake

पन्नगश्रेष्ठम् (pannagaśreṣṭham) - the foremost serpent (best of serpents)

(noun)

Accusative, masculine, singular of pannagaśreṣṭha

pannagaśreṣṭha - best or chief of serpents

Compound type : tatpuruṣa (pannaga+śreṣṭha)

• pannaga – a snake, serpent (literally, moving on its belly)
  noun (masculine)
• śreṣṭha – best, chief, excellent, most excellent
  adjective (masculine)

भृशम् (bhṛśam) - deeply (greatly, exceedingly, deeply)

(indeclinable)

शोकपरायणाः (śokaparāyaṇāḥ) - immersed in sorrow (devoted to sorrow, immersed in grief)

(adjective)

Nominative, masculine, plural of śokaparāyaṇa

śokaparāyaṇa - wholly given up to grief or sorrow, sorrow-stricken

Compound type : tatpuruṣa (śoka+parāyaṇa)

• śoka – sorrow, grief, lamentation
  noun (masculine)
• parāyaṇa – chief or sole object; devoted to, intent on, engaged in; dependent on
  adjective (masculine)