योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-155, verse-17

इत्थं तपस्त्वया घोरं कार्यं युगशतं पृथु ।
परमेष्ठी ततस्तुष्टस्त्वामुपैष्यति सामरः ॥ १७ ॥

itthaṃ tapastvayā ghoraṃ kāryaṃ yugaśataṃ pṛthu ,
parameṣṭhī tatastuṣṭastvāmupaiṣyati sāmaraḥ 17

17. ittham tapas tvayā ghoram kāryam yugaśatam pṛthu |
parameṣṭhī tataḥ tuṣṭaḥ tvām upaiṣyati sāmaraḥ ||

17. ittham tvayā ghoram pṛthu tapas yugaśatam kāryam.
tataḥ tuṣṭaḥ parameṣṭhī sāmaraḥ tvām upaiṣyati.

17. Thus, you must perform this intense and vast asceticism (tapas) for a hundred ages. Then, the Supreme Creator (Parameṣṭhī), being pleased, will approach you accompanied by the gods.

Words meanings summery:

• इत्थम् (ittham) - thus, in this manner, so

• तपस् (tapas) - austerity, penance, asceticism (tapas)

• त्वया (tvayā) - by you (singular)

• घोरम् (ghoram) - terrible, fierce, intense, formidable

• कार्यम् (kāryam) - to be done, ought to be done, duty

• युगशतम् (yugaśatam) - a hundred ages, for a hundred ages

• पृथु (pṛthu) - vast, extensive, great, broad

• परमेष्ठी (parameṣṭhī) - the Supreme Being, the Creator (Parameṣṭhī - often Brahmā)

• ततः (tataḥ) - then, thence, afterwards

• तुष्टः (tuṣṭaḥ) - pleased, contented, satisfied

• त्वाम् (tvām) - you (accusative singular)

• उपैष्यति (upaiṣyati) - will approach, will go to

• सामरः (sāmaraḥ) - together with the gods/immortals, accompanied by the gods

Words meanings and morphology

इत्थम् (ittham) - thus, in this manner, so

(indeclinable)

तपस् (tapas) - austerity, penance, asceticism (tapas)

(noun)

Nominative, neuter, singular of tapas

tapas - heat, warmth, austerity, penance, religious mortification (tapas)

Derived from root √tap (to heat, burn)

Root: √tap (class 1)

Note: Subject of the passive verb 'kāryam'

त्वया (tvayā) - by you (singular)

(pronoun)

Instrumental, singular of yūṣmad

yūṣmad - you

Note: Agent in the passive construction 'kāryam'

घोरम् (ghoram) - terrible, fierce, intense, formidable

(adjective)

Nominative, neuter, singular of ghora

ghora - terrible, dreadful, formidable, intense, awful

Note: Modifies 'tapas'

कार्यम् (kāryam) - to be done, ought to be done, duty

(adjective)

Nominative, neuter, singular of kārya

kārya - to be done, fit to be done, duty, action, work

Gerundive

Derived from root √kṛ (to do) with suffix -ya or -ṇya

Root: √kṛ (class 8)

Note: Used as a passive predicate with 'tapas' as subject

युगशतम् (yugaśatam) - a hundred ages, for a hundred ages

(noun)

Accusative, neuter, singular of yugaśata

yugaśata - a hundred ages

Compound type : dvigu (yuga+śata)

• yuga – age, epoch, period of time
  noun (neuter)
• śata – hundred
  numeral (neuter)

Note: Indicates duration of time

पृथु (pṛthu) - vast, extensive, great, broad

(adjective)

Nominative, neuter, singular of pṛthu

pṛthu - broad, wide, vast, extensive, great

Note: Modifies 'tapas'

परमेष्ठी (parameṣṭhī) - the Supreme Being, the Creator (Parameṣṭhī - often Brahmā)

(proper noun)

Nominative, masculine, singular of parameṣṭhin

parameṣṭhin - standing at the summit, the highest, the Supreme Being, a title of Brahmā

Derived from parama (highest) and sthin (standing)

Root: √sthā (class 1)

ततः (tataḥ) - then, thence, afterwards

(indeclinable)

तुष्टः (tuṣṭaḥ) - pleased, contented, satisfied

(adjective)

Nominative, masculine, singular of tuṣṭa

tuṣṭa - pleased, contented, satisfied

Past Passive Participle

Derived from root √tuṣ (to be pleased, satisfied)

Root: √tuṣ (class 4)

Note: Modifies 'parameṣṭhī'

त्वाम् (tvām) - you (accusative singular)

(pronoun)

Accusative, singular of yūṣmad

yūṣmad - you

Note: Object of 'upaiṣyati'

उपैष्यति (upaiṣyati) - will approach, will go to

(verb)

3rd person , singular, active, future (lṛṭ) of upaiṣyati

Future Tense, 3rd Person Singular

Derived from root √i (to go) with upasarga upa-

Prefix: upa

Root: √i (class 2)

सामरः (sāmaraḥ) - together with the gods/immortals, accompanied by the gods

(adjective)

Nominative, masculine, singular of sāmara

sāmara - accompanied by the gods/immortals

Bahuvrīhi compound of 'sa' (with) and 'amara' (immortal, god)

Compound type : bahuvrīhi (sa+amara)

• sa – with, together with
  indeclinable
  A prefix forming compounds indicating accompaniment or possession.
• amara – immortal, deathless, a god
  noun (masculine)
  Compound of 'a' (not) and 'mara' (mortal, from root √mṛ)
  Root: √mṛ (class 1)

Note: Modifies 'parameṣṭhī'