वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-1, chapter-29, verse-18

इमानपि वधिष्यामि निर्घृणान्दुष्टचारिणः ।
राक्षसान्पापकर्मस्थान्यज्ञघ्नान् रुधिराशनान् ॥१८॥

18. imānapi vadhiṣyāmi nirghṛṇānduṣṭacāriṇaḥ ,
rākṣasānpāpakarmasthānyajñaghnān rudhirāśanān.

18. imān api vadhiṣyāmi nirghṛṇān duṣṭacāriṇaḥ
rākṣasān pāpakarmasthānyajñaghnān rudhirāśanān

18. api imān nirghṛṇān duṣṭacāriṇaḥ rākṣasān
pāpakarmasthānyajñaghnān rudhirāśanān vadhiṣyāmi

18. I will also kill these merciless, evil-doing demons, whose actions are sinful and who obstruct Vedic rituals (yajña), and who devour blood.

Words meanings summery:

• इमान् (imān) - these

• अपि (api) - also, even

• वधिष्यामि (vadhiṣyāmi) - I will kill

• निर्घृणान् (nirghṛṇān) - merciless, cruel, pitiless

• दुष्टचारिणः (duṣṭacāriṇaḥ) - evil-doers, those of wicked conduct

• राक्षसान् (rākṣasān) - demons, monsters

• पापकर्मस्थान्यज्ञघ्नान् (pāpakarmasthānyajñaghnān) - those whose actions are sinful and who obstruct Vedic rituals (yajña) (those whose actions are sinful and who obstruct Vedic rituals)

• रुधिराशनान् (rudhirāśanān) - blood-eaters, those who consume blood

Words meanings and morphology

इमान् (imān) - these

(pronoun)

Accusative, masculine, plural of idam

idam - this, these

अपि (api) - also, even

(indeclinable)

वधिष्यामि (vadhiṣyāmi) - I will kill

(verb)

1st person , singular, active, future (lṛṭ) of vadh

Future tense, 1st person singular active

Root verb, 1st class (often in derivatives, but primary forms from other classes too)

Root: vadh (class 1)

निर्घृणान् (nirghṛṇān) - merciless, cruel, pitiless

(adjective)

Accusative, masculine, plural of nirghṛṇa

nirghṛṇa - merciless, pitiless, cruel, ruthless

Compound of nis (without) and ghṛṇā (pity)

Compound type : bahuvrīhi (nis+ghṛṇā)

• nis – out, forth, without, free from
  indeclinable
  Prefix indicating negation or exclusion
• ghṛṇā – pity, compassion, tenderness
  noun (feminine)

दुष्टचारिणः (duṣṭacāriṇaḥ) - evil-doers, those of wicked conduct

(adjective)

Accusative, masculine, plural of duṣṭacārin

duṣṭacārin - evil-doer, of wicked conduct, villainous

Compound of duṣṭa (wicked) and cārin (acting, behaving)

Compound type : karmadhāraya (duṣṭa+cārin)

• duṣṭa – corrupted, spoiled, wicked, evil
  adjective (neuter)
  Past Passive Participle
  From root duṣ (to be bad, corrupt)
  Root: duṣ (class 4)
• cārin – moving, walking, practising, acting
  adjective (masculine)
  From root car (to move, conduct)
  Root: car (class 1)

राक्षसान् (rākṣasān) - demons, monsters

(noun)

Accusative, masculine, plural of rākṣasa

rākṣasa - demon, evil spirit, monster

पापकर्मस्थान्यज्ञघ्नान् (pāpakarmasthānyajñaghnān) - those whose actions are sinful and who obstruct Vedic rituals (yajña) (those whose actions are sinful and who obstruct Vedic rituals)

(adjective)

Accusative, masculine, plural of pāpakarmasthānyajñaghna

pāpakarmasthānyajñaghna - being in sinful deeds and destroying sacrifices

Compound of pāpakarmastha (being in sinful acts) and yajñaghna (destroyer of sacrifices)

Compound type : dvandva / tatpuruṣa (pāpakarmastha+yajñaghna)

• pāpakarmastha – engaged in sinful acts, standing in sin
  adjective (masculine)
  Compound of pāpa (sin) + karma (action) + stha (standing/being)
• yajñaghna – destroyer of Vedic rituals, obstructor of sacrifices
  noun (masculine)
  Compound of yajña (Vedic ritual) and ghna (killer, destroyer)
  Root: han (class 2)

रुधिराशनान् (rudhirāśanān) - blood-eaters, those who consume blood

(noun)

Accusative, masculine, plural of rudhirāśana

rudhirāśana - blood-eater, a demon

Compound of rudhira (blood) and aśana (eating)

Compound type : tatpuruṣa (rudhira+aśana)

• rudhira – blood
  noun (neuter)
• aśana – eating, food, that which is eaten
  noun (neuter)
  From root aś (to eat)
  Root: aś (class 9)