महाभारतः mahābhārataḥ - book-12, chapter-300, verse-15

हृदयं सर्वभूतानां पर्वणोऽङ्गुष्ठमात्रकः ।
अनुग्रसत्यनन्तं हि महात्मा विश्वमीश्वरः ॥१५॥

15. hṛdayaṁ sarvabhūtānāṁ parvaṇo'ṅguṣṭhamātrakaḥ ,
anugrasatyanantaṁ hi mahātmā viśvamīśvaraḥ.

15. hṛdayam sarvabhūtānām parvaṇaḥ aṅguṣṭhamātrakaḥ
anugrasati anantam hi mahātmā viśvam īśvaraḥ

15. mahātmā īśvaraḥ hi sarvabhūtānām hṛdayam parvaṇaḥ
aṅguṣṭhamātrakaḥ anantam viśvam anugrasati

15. The great Self (ātman), the Lord (īśvaraḥ), is indeed thumb-sized in the heart of all beings, and He pervades the entire infinite universe.

Words meanings summery:

• हृदयम् (hṛdayam) - in the heart (heart, core, essence)

• सर्वभूतानाम् (sarvabhūtānām) - of all beings (of all beings, of all creatures)

• पर्वणः (parvaṇaḥ) - of a joint (in the sense of a measure or location) (of a joint, of a knot, of a segment)

• अङ्गुष्ठमात्रकः (aṅguṣṭhamātrakaḥ) - thumb-sized (thumb-sized, the measure of a thumb)

• अनुग्रसति (anugrasati) - pervades, encompasses (pervades, swallows, devours, encompasses)

• अनन्तम् (anantam) - the infinite (infinite, endless, eternal)

• हि (hi) - indeed, certainly (indeed, surely, certainly, because, for)

• महात्मा (mahātmā) - the great Self (ātman) (great-souled, noble, the great Self, a great person)

• विश्वम् (viśvam) - the universe (universe, all, whole, world)

• ईश्वरः (īśvaraḥ) - the Lord (īśvaraḥ) (Lord, master, ruler, god)

Words meanings and morphology

हृदयम् (hṛdayam) - in the heart (heart, core, essence)

(noun)

Accusative, neuter, singular of hṛdaya

hṛdaya - heart, mind, soul, core, essence

Note: Accusative singular neuter, functioning adverbially to indicate location ('in the heart').

सर्वभूतानाम् (sarvabhūtānām) - of all beings (of all beings, of all creatures)

(noun)

Genitive, neuter, plural of sarvabhūta

sarvabhūta - all beings, all creatures, everything that exists

Compound type : karmadhāraya (sarva+bhūta)

• sarva – all, every, whole
  pronoun (masculine)
• bhūta – being, creature, element, past, happened
  noun (neuter)
  Past Passive Participle
  Derived from root bhū- 'to be'
  Root: bhū (class 1)

पर्वणः (parvaṇaḥ) - of a joint (in the sense of a measure or location) (of a joint, of a knot, of a segment)

(noun)

Genitive, neuter, singular of parvan

parvan - knot, joint, segment (of a limb or plant), division, chapter, festival

Note: Genitive singular, possibly qualifying 'aṅguṣṭhamātrakaḥ' as 'of the measure of a joint'.

अङ्गुष्ठमात्रकः (aṅguṣṭhamātrakaḥ) - thumb-sized (thumb-sized, the measure of a thumb)

(adjective)

Nominative, masculine, singular of aṅguṣṭhamātraka

aṅguṣṭhamātraka - thumb-sized, a thumb-length

Compound type : tatpuruṣa (aṅguṣṭha+mātra)

• aṅguṣṭha – thumb, big toe
  noun (masculine)
• mātra – measure, only, merely, size
  noun (neuter)

Note: Nominative singular masculine, qualifying the implied subject (mahātmā/īśvaraḥ).

अनुग्रसति (anugrasati) - pervades, encompasses (pervades, swallows, devours, encompasses)

(verb)

3rd person , singular, active, present (laṭ) of gras

Present Indicative Active

3rd person singular present active of root gras with upasarga anu-

Prefix: anu

Root: gras (class 1)

अनन्तम् (anantam) - the infinite (infinite, endless, eternal)

(adjective)

Accusative, neuter, singular of ananta

ananta - endless, infinite, eternal, limitless, Vishnu (as Ananta)

Compound: a (negation) + anta (end)

Compound type : nañ-tatpuruṣa (a+anta)

• a – not, non-
  indeclinable
• anta – end, limit, boundary
  noun (masculine)

Note: Accusative singular neuter, modifying 'viśvam'.

हि (hi) - indeed, certainly (indeed, surely, certainly, because, for)

(indeclinable)

महात्मा (mahātmā) - the great Self (ātman) (great-souled, noble, the great Self, a great person)

(noun)

Nominative, masculine, singular of mahātman

mahātman - great-souled, noble, sublime, the great Self, a great person

Compound: mahat (great) + ātman (self)

Compound type : karmadhāraya (mahat+ātman)

• mahat – great, large, vast, important
  adjective (neuter)
• ātman – self, soul, spirit, essence
  noun (masculine)

विश्वम् (viśvam) - the universe (universe, all, whole, world)

(noun)

Accusative, neuter, singular of viśva

viśva - all, whole, entire, universe, world

Note: Accusative singular neuter, object of 'anugrasati'.

ईश्वरः (īśvaraḥ) - the Lord (īśvaraḥ) (Lord, master, ruler, god)

(noun)

Nominative, masculine, singular of īśvara

īśvara - Lord, master, ruler, controller, husband, God

From root īś- 'to own, command' + -vara suffix

Root: īś (class 2)

Note: Nominative singular masculine, in apposition to 'mahātmā'.