वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-4, chapter-2, verse-21

अरयश्च मनुष्येण विज्ञेयाश्छन्नचारिणः ।
विश्वस्तानामविश्वस्ताश्छिद्रेषु प्रहरन्ति हि ॥२१॥

21. arayaśca manuṣyeṇa vijñeyāśchannacāriṇaḥ ,
viśvastānāmaviśvastāśchidreṣu praharanti hi.

21. arayaḥ ca manuṣyeṇa vijñeyāḥ channacāriṇaḥ |
viśvastānām aviśvastāḥ chidreṣu praharanti hi

21. manuṣyeṇa channacāriṇaḥ arayaḥ ca vijñeyāḥ
aviśvastāḥ viśvastānām chidreṣu hi praharanti

21. A person should recognize their enemies, who operate covertly. Indeed, these untrustworthy individuals strike at the weaknesses of those who place their trust in them.

Words meanings summery:

• अरयः (arayaḥ) - enemies, foes

• च (ca) - and, also

• मनुष्येण (manuṣyeṇa) - by a man, by a human being

• विज्ञेयाः (vijñeyāḥ) - should be known, are to be recognized

• छन्नचारिणः (channacāriṇaḥ) - those who move secretly, disguised ones

• विश्वस्तानाम् (viśvastānām) - of those who are trusted, of the trusting ones

• अविश्वस्ताः (aviśvastāḥ) - untrusting, untrustworthy

• छिद्रेषु (chidreṣu) - in the holes, in the weak points, in the vulnerabilities

• प्रहरन्ति (praharanti) - they strike, they attack

• हि (hi) - indeed, certainly, because

Words meanings and morphology

अरयः (arayaḥ) - enemies, foes

(noun)

Nominative, masculine, plural of ari

ari - enemy, foe; master, lord; wheel; the sun

च (ca) - and, also

(indeclinable)

मनुष्येण (manuṣyeṇa) - by a man, by a human being

(noun)

Instrumental, masculine, singular of manuṣya

manuṣya - man, human being, person

विज्ञेयाः (vijñeyāḥ) - should be known, are to be recognized

(adjective)

Nominative, masculine, plural of vijñeya

vijñeya - to be known, to be recognized, to be understood

Gerundive

Derived from root jñā (to know) with prefix vi-, suffix -eya.

Prefix: vi

Root: jñā (class 9)

छन्नचारिणः (channacāriṇaḥ) - those who move secretly, disguised ones

(adjective)

Nominative, masculine, plural of channacārin

channacārin - moving secretly, disguised, concealed

Compound type : tatpuruṣa (channa+cārin)

• channa – covered, concealed, hidden, disguised
  adjective (masculine)
  Past Passive Participle
  From root chad (to cover) with suffix -ta.
  Root: chad (class 1)
• cārin – moving, going; acting, behaving; practising
  adjective (masculine)
  From root car (to move) with agent suffix -in.
  Root: car (class 1)

विश्वस्तानाम् (viśvastānām) - of those who are trusted, of the trusting ones

(adjective)

Genitive, masculine, plural of viśvasta

viśvasta - trusted, confided in; trusting, fearless

Past Passive Participle

From root śvas (to breathe) with prefix vi-, suffix -ta.

Prefix: vi

Root: śvas (class 2)

अविश्वस्ताः (aviśvastāḥ) - untrusting, untrustworthy

(adjective)

Nominative, masculine, plural of aviśvasta

aviśvasta - untrusted, untrustworthy, not confident

Negative particle 'a-' + viśvasta.

छिद्रेषु (chidreṣu) - in the holes, in the weak points, in the vulnerabilities

(noun)

Locative, neuter, plural of chidra

chidra - hole, opening, fault, defect, weakness, vulnerability

प्रहरन्ति (praharanti) - they strike, they attack

(verb)

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

Prefix: pra

Root: hṛ (class 1)

हि (hi) - indeed, certainly, because

(indeclinable)