महाभारतः mahābhārataḥ - book-5, chapter-97, verse-12

अत्र भूतपतिर्नाम सर्वभूतमहेश्वरः ।
भूतये सर्वभूतानामचरत्तप उत्तमम् ॥१२॥

12. atra bhūtapatirnāma sarvabhūtamaheśvaraḥ ,
bhūtaye sarvabhūtānāmacarattapa uttamam.

12. atra bhūtapatiḥ nāma sarvabhūtamaheśvaraḥ
bhūtaye sarvabhūtānām acarat tapaḥ uttamam

12. Here, Bhūtapati by name, the great lord of all beings, practiced excellent austerity (tapas) for the welfare of all beings.

Words meanings summery:

• अत्र (atra) - here, in this place

• भूतपतिः (bhūtapatiḥ) - Lord Shiva (lord of beings, lord of ghosts (a name of Shiva))

• नाम (nāma) - by name, indeed, namely, truly

• सर्वभूतमहेश्वरः (sarvabhūtamaheśvaraḥ) - Lord Shiva, as the great lord of all beings (the great lord of all beings, supreme lord of all creatures)

• भूतये (bhūtaye) - for the welfare, for the prosperity, for existence

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

• अचरत् (acarat) - he performed austerity (he practiced, he performed, he moved, he wandered)

• तपः (tapaḥ) - austerity, penance, heat, spiritual fervor (tapas)

• उत्तमम् (uttamam) - excellent, supreme, highest, best

Words meanings and morphology

अत्र (atra) - here, in this place

(indeclinable)

Note: Adverb of place

भूतपतिः (bhūtapatiḥ) - Lord Shiva (lord of beings, lord of ghosts (a name of Shiva))

(proper noun)

Nominative, masculine, singular of bhūtapati

bhūtapati - lord of beings/elements/ghosts, Shiva

Compound type : tatpuruṣa (bhūta+pati)

• bhūta – being, creature, element, ghost, past
  noun (neuter)
• pati – lord, master, husband, owner
  noun (masculine)

नाम (nāma) - by name, indeed, namely, truly

(indeclinable)

Note: Used adverbially to mean 'by name' or 'called'

सर्वभूतमहेश्वरः (sarvabhūtamaheśvaraḥ) - Lord Shiva, as the great lord of all beings (the great lord of all beings, supreme lord of all creatures)

(proper noun)

Nominative, masculine, singular of sarvabhūtamaheśvara

sarvabhūtamaheśvara - the great lord of all creatures/elements

Compound type : tatpuruṣa (sarvabhūta+maheśvara)

• sarvabhūta – all beings, all creatures, the whole element
  noun (neuter)
• maheśvara – great lord, Shiva
  proper noun (masculine)

भूतये (bhūtaye) - for the welfare, for the prosperity, for existence

(noun)

Dative, feminine, singular of bhūti

bhūti - welfare, prosperity, existence, being, supernatural power, ashes

Root: bhū (class 1)

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

(noun)

Genitive, neuter, plural of sarvabhūta

sarvabhūta - all beings, all creatures, the whole element

Compound type : karmadhāraya (sarva+bhūta)

• sarva – all, every, whole, complete
  pronoun
• bhūta – being, creature, element, ghost, past
  noun (neuter)

Note: Referring to all sentient beings, typically treated as masculine/feminine for agreement in plural.

अचरत् (acarat) - he performed austerity (he practiced, he performed, he moved, he wandered)

(verb)

3rd person , singular, active, imperfect indicative (laṅ) of car

Root: car (class 1)

तपः (tapaḥ) - austerity, penance, heat, spiritual fervor (tapas)

(noun)

Accusative, neuter, singular of tapas

tapas - heat, warmth, austerity, penance, religious mortification, spiritual practice

उत्तमम् (uttamam) - excellent, supreme, highest, best

(adjective)

Accusative, neuter, singular of uttama

uttama - highest, best, excellent, supreme, chief

Note: Qualifies 'tapaḥ'