महाभारतः mahābhārataḥ - book-12, chapter-342, verse-15

आर्जवेनापरे युक्ता निहतानार्जवैर्जनैः ।
ऋजवो नाकपृष्ठे वै शुद्धात्मानः प्रतिष्ठिताः ॥१५॥

15. ārjavenāpare yuktā nihatānārjavairjanaiḥ ,
ṛjavo nākapṛṣṭhe vai śuddhātmānaḥ pratiṣṭhitāḥ.

15. ārjavena apare yuktāḥ nihatān anārjavaiḥ janaiḥ
ṛjavaḥ nākapṛṣṭhe vai śuddhātmānaḥ pratiṣṭhitāḥ

15. apare ārjavena yuktāḥ anārjavaiḥ janaiḥ nihatān api,
ṛjavaḥ śuddhātmānaḥ vai nākapṛṣṭhe pratiṣṭhitāḥ

15. Others, who are devoted to straightforwardness—even if they are among those slain by dishonest people—these honest ones, truly pure in their inner self (ātman), are indeed established in the heavenly realm.

Words meanings summery:

• आर्जवेन (ārjavena) - by straightforwardness, sincerity, honesty

• अपरे (apare) - others

• युक्ताः (yuktāḥ) - endowed, connected, devoted

• निहतान् (nihatān) - those who were slain (by dishonest people) (slain ones, killed ones)

• अनार्जवैः (anārjavaiḥ) - by dishonest, by crooked, by insincere ones

• जनैः (janaiḥ) - by people, by individuals

• ऋजवः (ṛjavaḥ) - honest ones, straightforward ones

• नाकपृष्ठे (nākapṛṣṭhe) - on the back of heaven, in heaven, in the celestial realm

• वै (vai) - indeed, certainly, verily (an emphatic particle)

• शुद्धात्मानः (śuddhātmānaḥ) - pure-souled, pure in spirit

• प्रतिष्ठिताः (pratiṣṭhitāḥ) - established, settled, residing

Words meanings and morphology

आर्जवेन (ārjavena) - by straightforwardness, sincerity, honesty

(noun)

Instrumental, neuter, singular of ārjava

ārjava - straightforwardness, sincerity, honesty, integrity

Derived from 'ṛju' (straight, honest).

अपरे (apare) - others

(pronoun)

Nominative, masculine, plural of para

para - other, different, subsequent, supreme, excellent

युक्ताः (yuktāḥ) - endowed, connected, devoted

(participle)

Nominative, masculine, plural of yukta

yukta - joined, connected, engaged, devoted, disciplined, appropriate

Past Passive Participle

Root: yuj (class 7)

निहतान् (nihatān) - those who were slain (by dishonest people) (slain ones, killed ones)

(participle)

Accusative, masculine, plural of nihata

nihata - struck down, killed, destroyed, smitten

Past Passive Participle

Prefix: ni

Root: han (class 2)

अनार्जवैः (anārjavaiḥ) - by dishonest, by crooked, by insincere ones

(adjective)

Instrumental, masculine, plural of anārjava

anārjava - dishonest, crooked, insincere, lacking straightforwardness

Formed with the negative prefix 'an-' from 'ārjava' (straightforwardness).

Compound type : nañ-tatpuruṣa (an+ārjava)

• an – not, un-
  indeclinable
• ārjava – straightforwardness, sincerity, honesty
  noun (neuter)

जनैः (janaiḥ) - by people, by individuals

(noun)

Instrumental, masculine, plural of jana

jana - person, people, creature, mankind

ऋजवः (ṛjavaḥ) - honest ones, straightforward ones

(adjective)

Nominative, masculine, plural of ṛju

ṛju - straight, honest, sincere, simple, upright

नाकपृष्ठे (nākapṛṣṭhe) - on the back of heaven, in heaven, in the celestial realm

(noun)

Locative, neuter, singular of nākapṛṣṭha

nākapṛṣṭha - heavenly region, firmament, literally 'back of heaven'

Compound type : ṣaṣṭhī-tatpuruṣa (nāka+pṛṣṭha)

• nāka – heaven, sky, atmosphere
  noun (neuter)
• pṛṣṭha – back, surface, top, rear
  noun (neuter)

वै (vai) - indeed, certainly, verily (an emphatic particle)

(indeclinable)

शुद्धात्मानः (śuddhātmānaḥ) - pure-souled, pure in spirit

(adjective)

Nominative, masculine, plural of śuddhātman

śuddhātman - one whose soul (ātman) is pure, pure in spirit

Compound type : bahuvrihi (śuddha+ātman)

• śuddha – pure, clean, clear, spotless
  participle (masculine)
  Past Passive Participle
  Root: śudh (class 4)
• ātman – self, soul, spirit, essential nature
  noun (masculine)

प्रतिष्ठिताः (pratiṣṭhitāḥ) - established, settled, residing

(participle)

Nominative, masculine, plural of pratiṣṭhita

pratiṣṭhita - established, fixed, based, consecrated, residing, renowned

Past Passive Participle

Prefix: prati

Root: sthā (class 1)