महाभारतः mahābhārataḥ - book-7, chapter-148, verse-51

रात्रौ हि राक्षसा भूयो भवन्त्यमितविक्रमाः ।
बलवन्तः सुदुर्धर्षाः शूरा विक्रान्तचारिणः ॥५१॥

51. rātrau hi rākṣasā bhūyo bhavantyamitavikramāḥ ,
balavantaḥ sudurdharṣāḥ śūrā vikrāntacāriṇaḥ.

51. rātrau hi rākṣasāḥ bhūyaḥ bhavanti amitavikramāḥ
balavantaḥ sudurdharṣāḥ śūrāḥ vikrāntacāriṇaḥ

51. hi rātrau rākṣasāḥ bhūyaḥ amitavikramāḥ balavantaḥ
sudurdharṣāḥ śūrāḥ vikrāntacāriṇaḥ bhavanti

51. Indeed, at night, the rākṣasas become immensely powerful, possessing immeasurable valor, very difficult to overcome, valiant, and moving with mighty strides.

Words meanings summery:

• रात्रौ (rātrau) - at night

• हि (hi) - indeed, surely, for

• राक्षसाः (rākṣasāḥ) - rākṣasas, demons

• भूयः (bhūyaḥ) - again, further, more, exceedingly

• भवन्ति (bhavanti) - they become, they are

• अमितविक्रमाः (amitavikramāḥ) - of immeasurable valor, whose valor is immeasurable

• बलवन्तः (balavantaḥ) - powerful, strong

• सुदुर्धर्षाः (sudurdharṣāḥ) - very difficult to overcome, invincible

• शूराः (śūrāḥ) - valiant, brave

• विक्रान्तचारिणः (vikrāntacāriṇaḥ) - moving with mighty strides, acting valiantly

Words meanings and morphology

रात्रौ (rātrau) - at night

(noun)

Locative, feminine, singular of rātri

rātri - night

हि (hi) - indeed, surely, for

(indeclinable)

राक्षसाः (rākṣasāḥ) - rākṣasas, demons

(noun)

Nominative, masculine, plural of rākṣasa

rākṣasa - rākṣasa, demon, a class of malevolent beings

भूयः (bhūyaḥ) - again, further, more, exceedingly

(indeclinable)

Note: Adverbial use of comparative.

भवन्ति (bhavanti) - they become, they are

(verb)

3rd person , plural, active, present (laṭ) of bhū

Root: bhū (class 1)

अमितविक्रमाः (amitavikramāḥ) - of immeasurable valor, whose valor is immeasurable

(adjective)

Nominative, masculine, plural of amitavikrama

amitavikrama - one whose valor is immeasurable

Compound type : bahuvrihi (amita+vikrama)

• amita – unmeasured, immeasurable
  adjective
  Past Passive Participle
  From root mā (to measure) with negative prefix a-
  Root: mā (class 3)
• vikrama – valor, might, courage
  noun (masculine)

बलवन्तः (balavantaḥ) - powerful, strong

(adjective)

Nominative, masculine, plural of balavat

balavat - strong, powerful, mighty

सुदुर्धर्षाः (sudurdharṣāḥ) - very difficult to overcome, invincible

(adjective)

Nominative, masculine, plural of sudurdharṣa

sudurdharṣa - very difficult to be overcome, unassailable, invincible

Compound type : karmadhāraya (su+durdharṣa)

• su – well, good, very
  indeclinable
• durdharṣa – difficult to be assailed, formidable
  adjective
  Gerundive/Future Passive Participle
  From prefix dur- + root dhṛṣ (to dare, attack)
  Prefix: dur
  Root: dhṛṣ (class 5)

शूराः (śūrāḥ) - valiant, brave

(noun)

Nominative, masculine, plural of śūra

śūra - brave, valiant, warrior, hero

विक्रान्तचारिणः (vikrāntacāriṇaḥ) - moving with mighty strides, acting valiantly

(adjective)

Nominative, masculine, plural of vikrāntacārin

vikrāntacārin - moving valiantly, acting with prowess

Compound type : upapada-tatpuruṣa (vikrānta+cārin)

• vikrānta – mighty, brave, valorous
  adjective
  Past Passive Participle
  From prefix vi- + root kram (to stride, go)
  Prefix: vi
  Root: kram (class 1)
• cārin – moving, performing, acting
  adjective
  Agent noun/adjective from root car
  Root: car (class 1)