महाभारतः mahābhārataḥ - book-3, chapter-159, verse-16

आत्मजावात्मसंपन्नौ यमौ चोभौ यथाश्विनोः ।
रक्ष्यास्तद्वन्ममापीह यूयं सर्वे युधिष्ठिर ॥१६॥

16. ātmajāvātmasaṁpannau yamau cobhau yathāśvinoḥ ,
rakṣyāstadvanmamāpīha yūyaṁ sarve yudhiṣṭhira.

16. ātmajāu ātmasaṃpannau yamāu ca ubhāu yathā aśvinoḥ
rakṣyāḥ tadvat mama api iha yūyam sarve yudhiṣṭhira

16. And just as both Aśvins are self-born twins endowed with control over their innermost self (ātman), similarly, all of you here, O Yudhiṣṭhira, are to be protected by me.

Words meanings summery:

• आत्मजाउ (ātmajāu) - self-born, son of self

• आत्मसंपन्नौ (ātmasaṁpannau) - Endowed with control over their innermost self (ātman). (endowed with self-mastery, self-possessed)

• यमाउ (yamāu) - twins

• च (ca) - and

• उभाउ (ubhāu) - both

• यथा (yathā) - just as, as

• अश्विनोः (aśvinoḥ) - of the Aśvins

• रक्ष्याः (rakṣyāḥ) - to be protected, fit to be guarded

• तद्वत् (tadvat) - similarly, likewise, in that manner

• मम (mama) - By me (possessive implying agent or beneficiary). (my, by me)

• अपि (api) - also, even, too

• इह (iha) - here, in this world

• यूयम् (yūyam) - you (all)

• सर्वे (sarve) - all, everyone

• युधिष्ठिर (yudhiṣṭhira) - O Yudhiṣṭhira

Words meanings and morphology

आत्मजाउ (ātmajāu) - self-born, son of self

(noun)

Nominative, masculine, dual of ātmaja

ātmaja - self-born, son, born of the soul

Compound of ātman and ja (from jan root)

Compound type : ṣaṣṭhī-tatpuruṣa (ātman+ja)

• ātman – self, soul, spirit, innermost being
  noun (masculine)
• ja – born, produced from
  adjective
  Substantive derived from root jan
  Root: jan (class 4)

आत्मसंपन्नौ (ātmasaṁpannau) - Endowed with control over their innermost self (ātman). (endowed with self-mastery, self-possessed)

(adjective)

Nominative, masculine, dual of ātmasaṃpanna

ātmasaṁpanna - endowed with self-mastery, self-possessed

Past Passive Participle

Compound of ātman and sampanna (from sam-pad)

Compound type : tatpuruṣa (ātman+sampanna)

• ātman – self, soul, spirit, innermost being
  noun (masculine)
• sampanna – endowed with, complete, furnished
  adjective
  Past Passive Participle
  From prefix sam- and root pad
  Prefix: sam
  Root: pad (class 4)

यमाउ (yamāu) - twins

(noun)

Nominative, masculine, dual of yama

yama - twin, Yama (god of death), control, restraint

Root: yam (class 1)

च (ca) - and

(indeclinable)

उभाउ (ubhāu) - both

(pronoun)

Nominative, masculine, dual of ubha

ubha - both

यथा (yathā) - just as, as

(indeclinable)

अश्विनोः (aśvinoḥ) - of the Aśvins

(proper noun)

Genitive, masculine, dual of aśvin

aśvin - the Aśvins (twin Vedic deities), horseman

रक्ष्याः (rakṣyāḥ) - to be protected, fit to be guarded

(adjective)

Nominative, masculine, plural of rakṣya

rakṣya - to be protected, protectable, defensible

Future Passive Participle (Gerundive)

Derived from root rakṣ (to protect)

Root: rakṣ (class 1)

तद्वत् (tadvat) - similarly, likewise, in that manner

(indeclinable)

मम (mama) - By me (possessive implying agent or beneficiary). (my, by me)

(pronoun)

Genitive, singular of mad

mad - I, me

अपि (api) - also, even, too

(indeclinable)

इह (iha) - here, in this world

(indeclinable)

यूयम् (yūyam) - you (all)

(pronoun)

Nominative, plural of yuṣmad

yuṣmad - you

सर्वे (sarve) - all, everyone

(adjective)

Nominative, masculine, plural of sarva

sarva - all, every, whole

युधिष्ठिर (yudhiṣṭhira) - O Yudhiṣṭhira

(proper noun)

Vocative, masculine, singular of yudhiṣṭhira

yudhiṣṭhira - steady in battle, Yudhiṣṭhira (eldest Pāṇḍava brother)

Compound: yudhi (in battle) + sthira (steady)

Compound type : saptamī-tatpuruṣa (yudhi+sthira)

• yudhi – in battle, in war
  noun (feminine)
  Locative singular of yudh (battle)
  Root: yudh (class 4)
• sthira – steady, firm, constant
  adjective
  Derived from root sthā (to stand)
  Root: sthā (class 1)