वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-4, chapter-41, verse-50

दृष्टायां तु नरेन्द्रस्या पत्न्याममिततेजसः ।
कृतकृत्या भविष्यामः कृतस्य प्रतिकर्मणा ॥५०॥

50. dṛṣṭāyāṃ tu narendrasyā patnyāmamitatejasaḥ ,
kṛtakṛtyā bhaviṣyāmaḥ kṛtasya pratikarmaṇā.

50. dṛṣṭāyām tu narendrasya patnyām amitatejasaḥ
kṛtakṛtyāḥ bhaviṣyāmaḥ kṛtasya pratikarmaṇā

50. Indeed, once the wife of the king, who possesses immeasurable splendor, is found, we shall feel accomplished by having avenged the deed.

Words meanings summery:

• दृष्टायाम् (dṛṣṭāyām) - upon being seen, upon finding

• तु (tu) - but, indeed, however

• नरेन्द्रस्य (narendrasya) - of the king

• पत्न्याम् (patnyām) - in/on/upon the wife

• अमिततेजसः (amitatejasaḥ) - of immeasurable splendor/power

• कृतकृत्याः (kṛtakṛtyāḥ) - having accomplished one's purpose, fulfilled

• भविष्यामः (bhaviṣyāmaḥ) - we shall be

• कृतस्य (kṛtasya) - of what has been done, of the deed

• प्रतिकर्मणा (pratikarmaṇā) - by means of counter-action, by avenging

Words meanings and morphology

दृष्टायाम् (dṛṣṭāyām) - upon being seen, upon finding

(adjective)

Locative, feminine, singular of dṛṣṭa

dṛṣṭa - seen, perceived, found

Past Passive Participle

from √dṛś 'to see'

Root: dṛś (class 1)

Note: Refers to the wife, Sītā.

तु (tu) - but, indeed, however

(indeclinable)

नरेन्द्रस्य (narendrasya) - of the king

(noun)

Genitive, masculine, singular of narendra

narendra - king (lord of men)

Compound type : tatpuruṣa (nara+indra)

• nara – man, human being
  noun (masculine)
• indra – lord, chief, Indra
  noun (masculine)

Note: Refers to Rāma. The 'ā' in Devanagari 'narendrasyā' is a poetic or regional variant of the standard genitive 'narendrasya'.

पत्न्याम् (patnyām) - in/on/upon the wife

(noun)

Locative, feminine, singular of patnī

patnī - wife, mistress, lady

Note: Refers to Sītā.

अमिततेजसः (amitatejasaḥ) - of immeasurable splendor/power

(adjective)

Genitive, masculine, singular of amitatejas

amitatejas - of immeasurable splendor, of boundless energy

Compound type : bahuvrīhi (amita+tejas)

• amita – unmeasured, boundless, infinite
  adjective (masculine)
  Past Passive Participle (negative)
  from a- + √mā 'to measure'
  Root: mā (class 3)
• tejas – splendor, radiance, power, energy
  noun (neuter)

Note: Qualifies 'narendrasya'.

कृतकृत्याः (kṛtakṛtyāḥ) - having accomplished one's purpose, fulfilled

(adjective)

Nominative, masculine, plural of kṛtakṛtya

kṛtakṛtya - one who has done what ought to be done, fulfilled

Compound type : bahuvrīhi (kṛta+kṛtya)

• kṛta – done, made, accomplished
  adjective (masculine)
  Past Passive Participle
  from √kṛ 'to do'
  Root: kṛ (class 8)
• kṛtya – to be done, duty, action
  adjective (neuter)
  Gerundive
  from √kṛ 'to do'
  Root: kṛ (class 8)

Note: Refers to the speakers (monkeys/Vanaras). Devanagari 'kṛtakṛtyā' is likely a poetic variant or typo for 'kṛtakṛtyāḥ' to agree with 'bhaviṣyāmaḥ'.

भविष्यामः (bhaviṣyāmaḥ) - we shall be

(verb)

1st person , plural, active, future (lṛṭ) of bhū

Root: bhū (class 1)

कृतस्य (kṛtasya) - of what has been done, of the deed

(noun)

Genitive, neuter, singular of kṛta

kṛta - done, made, accomplished, a deed

Past Passive Participle (substantivized)

from √kṛ 'to do'

Root: kṛ (class 8)

Note: Refers to the abduction of Sītā.

प्रतिकर्मणा (pratikarmaṇā) - by means of counter-action, by avenging

(noun)

Instrumental, neuter, singular of pratikarman

pratikarman - retaliation, revenge, counter-action

from prati-√kṛ 'to act in return'

Prefix: prati

Root: kṛ (class 8)