महाभारतः mahābhārataḥ - book-12, chapter-138, verse-52

अमित्रं नैव मुञ्चेत ब्रुवन्तं करुणान्यपि ।
दुःखं तत्र न कुर्वीत हन्यात्पूर्वापकारिणम् ॥५२॥

52. amitraṁ naiva muñceta bruvantaṁ karuṇānyapi ,
duḥkhaṁ tatra na kurvīta hanyātpūrvāpakāriṇam.

52. amitram na eva muñceta bruvantam karuṇāni api
duḥkham tatra na kurvīta hanyāt pūrva-apakāriṇam

52. (janaḥ) amitram bruvantam karuṇāni api na eva muñceta.
tatra duḥkham na kurvīta.
pūrva-apakāriṇam hanyāt (ca).

52. One should never release an enemy, even if he speaks piteous words. One should not feel sorrow for such a one, but rather kill the one who has previously caused harm.

Words meanings summery:

• अमित्रम् (amitram) - an enemy (enemy, foe)

• न (na) - not (not, no)

• एव (eva) - never (with 'na') (indeed, only, certainly, even)

• मुञ्चेत (muñceta) - one should release (one should release, he may release)

• ब्रुवन्तम् (bruvantam) - speaking (speaking, saying)

• करुणानि (karuṇāni) - piteous words (piteous, compassionate (things/words))

• अपि (api) - even if (also, even, moreover)

• दुःखम् (duḥkham) - sorrow (sorrow, pain, suffering)

• तत्र (tatra) - for such a one (there, in that case, for that)

• न (na) - not (not, no)

• कुर्वीत (kurvīta) - one should feel (make sorrow) (one should do, he may do)

• हन्यात् (hanyāt) - one should kill (one should kill, he may kill)

• पूर्व-अपकारिणम् (pūrva-apakāriṇam) - the one who has previously harmed (one who has previously harmed, former offender)

Words meanings and morphology

अमित्रम् (amitram) - an enemy (enemy, foe)

(noun)

Accusative, masculine, singular of amitra

amitra - enemy, foe, not a friend

Compound type : nañ-tatpuruṣa (a+mitra)

• a – not, non-
  prefix
• mitra – friend, companion, ally
  noun (masculine)

न (na) - not (not, no)

(indeclinable)

एव (eva) - never (with 'na') (indeed, only, certainly, even)

(indeclinable)

मुञ्चेत (muñceta) - one should release (one should release, he may release)

(verb)

3rd person , singular, active, optative (vidhiliṅ) of muc

Root: muc (class 6)

ब्रुवन्तम् (bruvantam) - speaking (speaking, saying)

(adjective)

Accusative, masculine, singular of bruvat

bruvat - speaking, saying

present active participle

From root brū + śatṛ

Root: brū (class 2)

करुणानि (karuṇāni) - piteous words (piteous, compassionate (things/words))

(noun)

Accusative, neuter, plural of karuṇa

karuṇa - piteous, compassionate, tender, pitiful

अपि (api) - even if (also, even, moreover)

(indeclinable)

दुःखम् (duḥkham) - sorrow (sorrow, pain, suffering)

(noun)

Accusative, neuter, singular of duḥkha

duḥkha - sorrow, pain, suffering, uneasiness

तत्र (tatra) - for such a one (there, in that case, for that)

(indeclinable)

From demonstrative base ta + tral

न (na) - not (not, no)

(indeclinable)

कुर्वीत (kurvīta) - one should feel (make sorrow) (one should do, he may do)

(verb)

3rd person , singular, middle (ātmanepada), optative (vidhiliṅ) of kṛ

Root: kṛ (class 8)

हन्यात् (hanyāt) - one should kill (one should kill, he may kill)

(verb)

3rd person , singular, active, optative (vidhiliṅ) of han

Root: han (class 2)

पूर्व-अपकारिणम् (pūrva-apakāriṇam) - the one who has previously harmed (one who has previously harmed, former offender)

(noun)

Accusative, masculine, singular of pūrvāpakārin

pūrvāpakārin - one who has previously caused harm, a former offender

Compound type : tatpuruṣa (pūrva+apakārin)

• pūrva – former, previous, prior
  adjective
• apakārin – harming, injuring, offender
  adjective (masculine)
  agent noun
  From apa-kṛ + ṇin
  Prefix: apa
  Root: kṛ (class 8)