महाभारतः mahābhārataḥ - book-2, chapter-5, verse-28

कच्चिद्द्विषामविदितः प्रतियत्तश्च सर्वदा ।
नित्ययुक्तो रिपून्सर्वान्वीक्षसे रिपुसूदन ॥२८॥

28. kacciddviṣāmaviditaḥ pratiyattaśca sarvadā ,
nityayukto ripūnsarvānvīkṣase ripusūdana.

28. kaccit dviṣām aviditaḥ pratiyattaḥ ca sarvadā
nityayuktaḥ ripūn sarvān vīkṣase ripusūdana

28. O slayer of enemies, I hope that you are always vigilant and prepared, discreetly observing all your enemies without their knowledge.

Words meanings summery:

• कच्चित् (kaccit) - I hope that; Is it that?

• द्विषाम् (dviṣām) - of enemies

• अविदितः (aviditaḥ) - unknown; unnoticed; unperceived

• प्रतियत्तः (pratiyattaḥ) - prepared; ready; vigilant

• च (ca) - and; also

• सर्वदा (sarvadā) - always; at all times

• नित्ययुक्तः (nityayuktaḥ) - constantly engaged; ever vigilant; always attentive

• रिपून् (ripūn) - enemies; foes

• सर्वान् (sarvān) - all; every

• वीक्षसे (vīkṣase) - you observe; you see; you perceive

• रिपुसूदन (ripusūdana) - Refers to the person being addressed, likely Yudhiṣṭhira or a king. (O slayer of enemies)

Words meanings and morphology

कच्चित् (kaccit) - I hope that; Is it that?

(indeclinable)

द्विषाम् (dviṣām) - of enemies

(noun)

Genitive, masculine, plural of dviṣ

dviṣ - enemy; hater; adversary

अविदितः (aviditaḥ) - unknown; unnoticed; unperceived

(adjective)

Nominative, masculine, singular of avidita

avidita - unknown; unnoticed; unperceived; not learned

Past Passive Participle

Derived from root vid (to know) with negative prefix a-

Compound type : nañ-tatpuruṣa (a+vidita)

• a – not; un-
  indeclinable
• vidita – known; perceived; understood
  adjective (masculine)
  Past Passive Partication
  Past passive participle of root vid (to know)
  Root: vid (class 2)

प्रतियत्तः (pratiyattaḥ) - prepared; ready; vigilant

(adjective)

Nominative, masculine, singular of pratiyatta

pratiyatta - prepared; ready; vigilant; arranged

Past Passive Participle

Past passive participle of root yam (to control, restrain) with prefix prati

Prefix: prati

Root: yam (class 1)

च (ca) - and; also

(indeclinable)

सर्वदा (sarvadā) - always; at all times

(indeclinable)

Derived from sarva (all) + suffix -dā (indicating time)

नित्ययुक्तः (nityayuktaḥ) - constantly engaged; ever vigilant; always attentive

(adjective)

Nominative, masculine, singular of nityayukta

nityayukta - constantly engaged; ever vigilant; always attentive; always devoted

Compound type : karmadhāraya (nitya+yukta)

• nitya – constant; eternal; always; perpetual
  adjective (masculine)
• yukta – engaged; joined; attentive; vigilant; yoked
  adjective (masculine)
  Past Passive Participle
  Past passive participle of root yuj (to join)
  Root: yuj (class 7)

रिपून् (ripūn) - enemies; foes

(noun)

Accusative, masculine, plural of ripu

ripu - enemy; foe; adversary

सर्वान् (sarvān) - all; every

(pronoun)

Accusative, masculine, plural of sarva

sarva - all; every; whole; entire

वीक्षसे (vīkṣase) - you observe; you see; you perceive

(verb)

2nd person , singular, middle, present (laṭ) of vīkṣ

Prefix: vi

Root: īkṣ (class 1)

रिपुसूदन (ripusūdana) - Refers to the person being addressed, likely Yudhiṣṭhira or a king. (O slayer of enemies)

(proper noun)

Vocative, masculine, singular of ripusūdana

ripusūdana - slayer of enemies; destroyer of foes

Compound type : ṣaṣṭhī-tatpuruṣa (ripu+sūdana)

• ripu – enemy; foe
  noun (masculine)
• sūdana – slayer; destroyer; crushing
  noun (masculine)
  Agent noun from root sūd (to destroy, kill)
  Root: sūd (class 10)