वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-1, chapter-48, verse-13

ददर्श च महाभागां तपसा द्योतितप्रभाम् ।
लोकैरपि समागम्य दुर्निरीक्ष्यां सुरासुरैः ॥१३॥

13. dadarśa ca mahābhāgāṃ tapasā dyotitaprabhām ,
lokairapi samāgamya durnirīkṣyāṃ surāsuraiḥ.

13. dadarśa ca mahābhāgām tapasā dyotitaprabhām
lokaiḥ api samāgamya durnirīkṣyām surāsuraiḥ

13. dadarśa ca mahābhāgām dyotitaprabhām tapasā
durnirīkṣyām lokaiḥ api surāsuraiḥ samāgamya

13. And he saw the highly revered woman, whose splendor was radiant from her asceticism (tapas). She was difficult to behold even for people, gods, and demons, even upon their approach.

Words meanings summery:

• ददर्श (dadarśa) - saw, beheld, perceived

• च (ca) - and, also, moreover

• महाभागाम् (mahābhāgām) - referring to Ahalya (the highly fortunate one, the highly revered one, the greatly glorious one)

• तपसा (tapasā) - by austerity, by penance, by asceticism

• द्योतितप्रभाम् (dyotitaprabhām) - whose splendor was illuminated, having radiant light

• लोकैः (lokaiḥ) - by people, by the worlds' inhabitants

• अपि (api) - even, also, too

• समागम्य (samāgamya) - having approached, having met, having assembled

• दुर्निरीक्ष्याम् (durnirīkṣyām) - difficult to look at, hard to behold, unapproachable

• सुरासुरैः (surāsuraiḥ) - by gods and demons

Words meanings and morphology

ददर्श (dadarśa) - saw, beheld, perceived

(verb)

3rd person , singular, active, perfect (Liṭ) of √dṛś

Perfect tense (Liṭ)

Root dṛś (class 1, P), reduplicated in perfect. 3rd singular active.

Root: dṛś (class 1)

च (ca) - and, also, moreover

(indeclinable)

महाभागाम् (mahābhāgām) - referring to Ahalya (the highly fortunate one, the highly revered one, the greatly glorious one)

(adjective)

Accusative, feminine, singular of mahābhāgā

mahābhāgā - highly fortunate, greatly glorious, highly revered

From mahā (great) + bhāga (fortune/share). Feminine form.

Compound type : karmadhāraya (mahā+bhāga)

• mahā – great, large, mighty
  adjective
• bhāga – share, portion, fortune, destiny
  noun (masculine)
  Root: bhaj (class 1)

तपसा (tapasā) - by austerity, by penance, by asceticism

(noun)

Instrumental, neuter, singular of tapas

tapas - austerity, penance, asceticism (tapas), heat, suffering

Root: tap (class 1)

द्योतितप्रभाम् (dyotitaprabhām) - whose splendor was illuminated, having radiant light

(adjective)

Accusative, feminine, singular of dyotitaprabhā

dyotitaprabhā - having illuminated splendor, radiant

A Bahuvrīhi compound. 'She whose splendor (prabhā) has been illuminated (dyotita).'

Compound type : bahuvrīhi (dyotita+prabhā)

• dyotita – illuminated, made brilliant, shining
  adjective
  Past Passive Participle
  Derived from root dyut (to shine) with the suffix -ita.
  Root: dyut (class 1)
• prabhā – splendor, light, radiance, effulgence
  noun (feminine)
  From pra + bhā (to shine).
  Prefix: pra
  Root: bhā (class 2)

Note: Agrees with mahābhāgām.

लोकैः (lokaiḥ) - by people, by the worlds' inhabitants

(noun)

Instrumental, masculine, plural of loka

loka - world, people, folk, region

Root: lok (class 10)

अपि (api) - even, also, too

(indeclinable)

particle of emphasis

समागम्य (samāgamya) - having approached, having met, having assembled

(indeclinable)

Absolutive (gerund)

Formed from sam-ā-gam + ya suffix.

Prefixes: sam+ā

Root: gam (class 1)

दुर्निरीक्ष्याम् (durnirīkṣyām) - difficult to look at, hard to behold, unapproachable

(adjective)

Accusative, feminine, singular of durnirīkṣyā

durnirīkṣyā - difficult to look at, hard to behold, unapproachable

Gerundive

From dur (difficult) + nir (out) + īkṣ (to see) + ya (gerundive suffix). Feminine form.

Compound type : pra-ādi tatpuruṣa (dur+nirīkṣya)

• dur – difficult, bad, hard (prefix)
  indeclinable
• nirīkṣya – to be seen, to be looked at
  adjective
  Gerundive
  From nir + īkṣ + ya.
  Prefix: nir
  Root: īkṣ (class 1)

Note: Agrees with mahābhāgām.

सुरासुरैः (surāsuraiḥ) - by gods and demons

(noun)

Instrumental, masculine, plural of surāsura

surāsura - gods and demons

Dvandva compound of sura (god) and asura (demon).

Compound type : dvandva (sura+asura)

• sura – god, deity
  noun (masculine)
• asura – demon, titan, non-god
  noun (masculine)
  Formed from a-sura (not a god).
  Prefix: a

Note: Used collectively with lokaiḥ.