योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-53, verse-39

यदि वर्षसहस्राणि तपश्चरसि दारुणम् ।
यदि वा विलयात्मानं शिलायां चूर्णयस्यलम् ॥ ३९ ॥

yadi varṣasahasrāṇi tapaścarasi dāruṇam ,
yadi vā vilayātmānaṃ śilāyāṃ cūrṇayasyalam 39

39. yadi varṣasahasrāṇi tapaḥ carasi dāruṇam
yadi vā vilayātmānam śilāyām cūrṇayasi alam

39. yadi varṣasahasrāṇi dāruṇam tapaḥ carasi
yadi vā śilāyām vilayātmānam alam cūrṇayasi

39. Even if you perform severe austerity (tapas) for thousands of years, or if you completely crush your body (vilayātman) against a rock, then...

Words meanings summery:

• यदि (yadi) - if

• वर्षसहस्राणि (varṣasahasrāṇi) - thousands of years

• तपः (tapaḥ) - austerity, penance

• चरसि (carasi) - you perform, you practice

• दारुणम् (dāruṇam) - severe, terrible

• यदि (yadi) - if

• वा (vā) - or

• विलयात्मानम् (vilayātmānam) - your dissolving self, your body

• शिलायाम् (śilāyām) - on a rock

• चूर्णयसि (cūrṇayasi) - you crush, you pulverize

• अलम् (alam) - sufficiently, completely

Words meanings and morphology

यदि (yadi) - if

(indeclinable)

वर्षसहस्राणि (varṣasahasrāṇi) - thousands of years

(noun)

Accusative, neuter, plural of varṣasahasra

varṣasahasra - a thousand years

Compound type : tatpuruṣa (varṣa+sahasra)

• varṣa – year, rain
  noun (neuter)
• sahasra – a thousand
  noun (neuter)

Note: also nominative plural neuter

तपः (tapaḥ) - austerity, penance

(noun)

Accusative, neuter, singular of tapas

tapas - religious austerity, penance, heat, suffering

Note: also nominative singular neuter

चरसि (carasi) - you perform, you practice

(verb)

2nd person , singular, active, present (laṭ) of car

Root: car (class 1)

दारुणम् (dāruṇam) - severe, terrible

(adjective)

Accusative, neuter, singular of dāruṇa

dāruṇa - terrible, severe, harsh, cruel

Note: modifies tapas; also nominative singular neuter

यदि (yadi) - if

(indeclinable)

वा (vā) - or

(indeclinable)

विलयात्मानम् (vilayātmānam) - your dissolving self, your body

(noun)

Accusative, masculine, singular of vilayātman

vilayātman - the dissolving self; that which is subject to dissolution, body

Compound type : tatpuruṣa (vilaya+ātman)

• vilaya – dissolution, destruction, melting
  noun (masculine)
  Prefix: vi
  Root: lī (class 4)
• ātman – self, soul, spirit, essential nature, body
  noun (masculine)

Note: refers to one's own body

शिलायाम् (śilāyām) - on a rock

(noun)

Locative, feminine, singular of śilā

śilā - stone, rock

चूर्णयसि (cūrṇayasi) - you crush, you pulverize

(verb)

2nd person , singular, active, present (laṭ) of cūrṇay

denominative verb from noun 'cūrṇa' (powder)

Root: cūrṇ (class 10)

अलम् (alam) - sufficiently, completely

(indeclinable)

Note: adverb modifying cūrṇayasi