वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-3, chapter-30, verse-6

देवगन्धर्वभूतानामृषीणां च महात्मनाम् ।
अजेयं समरे शूरं व्यात्ताननमिवान्तकम् ॥६॥

6. devagandharvabhūtānāmṛṣīṇāṃ ca mahātmanām ,
ajeyaṃ samare śūraṃ vyāttānanamivāntakam.

6. devagandharvabhūtānām ṛṣīṇām ca mahātmanām
ajeyam samare śūram vyāttānanam iva antakam

6. devagandharvabhūtānām ca ṛṣīṇām mahātmanām
samare ajeyam śūram vyāttānanam iva antakam

6. Unconquerable in battle, heroic even for gods, gandharvas, other beings, and great sages, he resembled Yama (Antaka) with his gaping maw.

Words meanings summery:

• देवगन्धर्वभूतानाम् (devagandharvabhūtānām) - of gods, gandharvas, and other beings

• ऋषीणाम् (ṛṣīṇām) - of sages, seers

• च (ca) - and, also, moreover

• महात्मनाम् (mahātmanām) - of great souls, of noble ones

• अजेयम् (ajeyam) - unconquerable, invincible

• समरे (samare) - in battle, in war

• शूरम् (śūram) - heroic, brave, valorous

• व्यात्ताननम् (vyāttānanam) - with an open mouth, having a gaping maw

• इव (iva) - like, as, as it were

• अन्तकम् (antakam) - Yama (the god of death), the destroyer

Words meanings and morphology

देवगन्धर्वभूतानाम् (devagandharvabhūtānām) - of gods, gandharvas, and other beings

(noun)

Genitive, masculine, plural of devagandharvabhūta

devagandharvabhūta - gods, gandharvas, and (other) beings/creatures collectively

Compound type : dvandva (deva+gandharva+bhūta)

• deva – god, deity, celestial being
  noun (masculine)
• gandharva – celestial musician, a class of semi-divine beings
  noun (masculine)
• bhūta – being, creature, spirit, element
  noun (neuter)
  Past Passive Participle
  Derived from root 'bhū' (to be, become)
  Root: bhū (class 1)

ऋषीणाम् (ṛṣīṇām) - of sages, seers

(noun)

Genitive, masculine, plural of ṛṣi

ṛṣi - sage, seer, inspired poet

च (ca) - and, also, moreover

(indeclinable)

महात्मनाम् (mahātmanām) - of great souls, of noble ones

(adjective)

Genitive, masculine, plural of mahātman

mahātman - great-souled, noble, illustrious, high-minded

Compound type : karmadhāraya (mahat+ātman)

• mahat – great, large, mighty
  adjective (masculine)
• ātman – self, soul, spirit, essential nature (ātman)
  noun (masculine)

अजेयम् (ajeyam) - unconquerable, invincible

(adjective)

Accusative, masculine, singular of ajeya

ajeya - not to be conquered, invincible, unconquerable

Compound type : nañ-tatpuruṣa (a+jeya)

• a – not, un-
  indeclinable
• jeya – to be conquered, conquerable, vanquishable
  adjective (masculine)
  Gerundive
  Derived from the root 'ji' (to conquer, win)
  Root: ji (class 1)

समरे (samare) - in battle, in war

(noun)

Locative, masculine, singular of samara

samara - battle, war, combat

शूरम् (śūram) - heroic, brave, valorous

(adjective)

Accusative, masculine, singular of śūra

śūra - heroic, brave, valiant; a hero, warrior

व्यात्ताननम् (vyāttānanam) - with an open mouth, having a gaping maw

(adjective)

Accusative, masculine, singular of vyāttānana

vyāttānana - having an opened or gaping face/mouth

Compound type : bahuvrīhi (vyātta+ānana)

• vyātta – opened, stretched wide, gaping
  adjective (masculine)
  Past Passive Participle
  Derived from root 'dā' (to give, cut, put) with prefixes 'vi' and 'ā'
  Prefixes: vi+ā
  Root: dā (class 3)
• ānana – face, mouth, aspect
  noun (neuter)

इव (iva) - like, as, as it were

(indeclinable)

अन्तकम् (antakam) - Yama (the god of death), the destroyer

(proper noun)

Accusative, masculine, singular of antaka

antaka - ender, terminator; a name for Yama (the god of death)

Root: ant