महाभारतः mahābhārataḥ - book-11, chapter-24, verse-18

वासुदेवस्य सांनिध्ये पार्थेनाक्लिष्टकर्मणा ।
युध्यतः समरेऽन्येन प्रमत्तस्य निपातितः ॥१८॥

18. vāsudevasya sāṁnidhye pārthenākliṣṭakarmaṇā ,
yudhyataḥ samare'nyena pramattasya nipātitaḥ.

18. vāsudevasya sāṃnidhy pārthena akliṣṭakarmaṇā
yudhyataḥ samare anyena pramattasya nipātitaḥ

18. pārthena akliṣṭakarmaṇā vāsudevasya sāṃnidhy
samare anyena yudhyataḥ pramattasya nipātitaḥ

18. In the presence of Vāsudeva, Pārtha, whose actions are unfailing, struck down an opponent in battle who was fighting another and was thus distracted.

Words meanings summery:

• वासुदेवस्य (vāsudevasya) - of Vāsudeva, of Krishna

• सांनिध्य् (sāṁnidhy) - in the proximity, in the presence

• पार्थेन (pārthena) - by Pārtha, by Arjuna

• अक्लिष्टकर्मणा (akliṣṭakarmaṇā) - referring to Arjuna (by one whose deeds are unwearied, by one of unfailing actions)

• युध्यतः (yudhyataḥ) - of the enemy who was fighting (of one fighting, while fighting)

• समरे (samare) - in battle, in war

• अन्येन (anyena) - by another, by another person

• प्रमत्तस्य (pramattasya) - of the enemy who was inattentive/distracted (of the careless one, of the inattentive one, of the intoxicated one)

• निपातितः (nipātitaḥ) - struck down, killed, felled

Words meanings and morphology

वासुदेवस्य (vāsudevasya) - of Vāsudeva, of Krishna

(proper noun)

Genitive, masculine, singular of vāsudeva

vāsudeva - son of Vasudeva, Krishna

सांनिध्य् (sāṁnidhy) - in the proximity, in the presence

(noun)

Locative, neuter, singular of sāṃnidhy

sāṁnidhy - proximity, presence, nearness

from sam + nidhā + ya (suffix)

Prefix: sam

Root: dhā (class 3)

पार्थेन (pārthena) - by Pārtha, by Arjuna

(proper noun)

Instrumental, masculine, singular of pārtha

pārtha - son of Pṛthā (Kunti), Arjuna

Derived from Pṛthā (Kunti), with a patronymic suffix

अक्लिष्टकर्मणा (akliṣṭakarmaṇā) - referring to Arjuna (by one whose deeds are unwearied, by one of unfailing actions)

(adjective)

Instrumental, masculine, singular of akliṣṭakarman

akliṣṭakarman - one whose deeds are untroubled, whose actions are unwearied/unfailing

Compound type : bahuvrihi (a+kliṣṭa+karman)

• a – not, un-
  indeclinable
• kliṣṭa – wearied, troubled, fatigued
  adjective
  Past Passive Participle
  from root kliś
  Root: kliś (class 4)
• karman – deed, action, work (karma)
  noun (neuter)
  Root: kṛ (class 8)

Note: Agrees with Pārthena.

युध्यतः (yudhyataḥ) - of the enemy who was fighting (of one fighting, while fighting)

(adjective)

Genitive, masculine, singular of yudhyat

yudhyat - fighting, warring

Present Active Participle

from root yudh (4th class), present stem yudhya- + śatṛ suffix

Root: yudh (class 4)

Note: Agrees with pramattasya.

समरे (samare) - in battle, in war

(noun)

Locative, masculine, singular of samara

samara - battle, war, conflict

from sam + root ṛ (to go), often interpreted as 'coming together'

Prefix: sam

Root: ṛ (class 1)

अन्येन (anyena) - by another, by another person

(pronoun)

Instrumental, masculine, singular of anya

anya - other, another, different

Note: Refers to another opponent.

प्रमत्तस्य (pramattasya) - of the enemy who was inattentive/distracted (of the careless one, of the inattentive one, of the intoxicated one)

(adjective)

Genitive, masculine, singular of pramatta

pramatta - careless, negligent, inattentive, intoxicated

Past Passive Participle

from pra + mad

Prefix: pra

Root: mad (class 4)

Note: Agrees with yudhyataḥ.

निपातितः (nipātitaḥ) - struck down, killed, felled

(adjective)

Nominative, masculine, singular of nipātita

nipātita - struck down, caused to fall, killed

Past Passive Participle

Causative of ni + pat

Prefix: ni

Root: pat (class 1)

Note: Implies the unstated subject 'he' (the enemy).