योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-74, verse-18

तदुत्तिष्ठाशु गच्छामः सर्व एव पितामहम् ।
तद्वरार्थमनर्थाय विद्धि तत्सुमहत्तपः ॥ १८ ॥

taduttiṣṭhāśu gacchāmaḥ sarva eva pitāmaham ,
tadvarārthamanarthāya viddhi tatsumahattapaḥ 18

18. tad uttiṣṭha āśu gacchāmaḥ sarve eva pitāmaham
tat vara artham anarthāya viddhi tat sumahat tapaḥ

18. tad āśu uttiṣṭha sarve eva pitāmaham gacchāmaḥ
tat vara artham anarthāya tat sumahat tapaḥ viddhi

18. Therefore, rise up quickly, let us all go to the Grandfather (Brahmā)! Understand that her supremely great ascetic practice (tapas), intended for a boon from him, will lead to our ruin.

Words meanings summery:

• तद् (tad) - therefore (therefore, so, then)

• उत्तिष्ठ (uttiṣṭha) - rise up (addressed to a god, implicitly plural) (rise up, stand up)

• आशु (āśu) - quickly (quickly, swiftly)

• गच्छामः (gacchāmaḥ) - let us go

• सर्वे (sarve) - all (of us) (all, everyone)

• एव (eva) - indeed, all of us (indeed, certainly, only)

• पितामहम् (pitāmaham) - to the Grandfather (Brahmā) (to the grandfather, to Brahmā)

• तत् (tat) - his (referring to Śiva, the potential giver of the boon) (that (singular, neuter); his/her/its (genitive))

• वर (vara) - boon (that Pārvatī seeks) (boon, blessing, choice)

• अर्थम् (artham) - for the sake of (purpose, meaning, for the sake of)

• अनर्थाय (anarthāya) - for (our) ruin (for calamity, for misfortune, for ruin)

• विद्धि (viddhi) - understand! (know! understand!)

• तत् (tat) - that (referring to her tapas) (that)

• सुमहत् (sumahat) - supremely great (very great, exceedingly large)

• तपः (tapaḥ) - ascetic practice (tapas) (ascetic practice, penance, austerity)

Words meanings and morphology

तद् (tad) - therefore (therefore, so, then)

(indeclinable)

उत्तिष्ठ (uttiṣṭha) - rise up (addressed to a god, implicitly plural) (rise up, stand up)

(verb)

2nd person , singular, active, imperative (loṭ (Loṭ lakāra)) of ut-sthā

Imperative mood, 2nd person singular.

Prefix: ut

Root: sthā (class 1)

आशु (āśu) - quickly (quickly, swiftly)

(indeclinable)

Adverb.

गच्छामः (gacchāmaḥ) - let us go

(verb)

1st person , plural, active, imperative (loṭ (Loṭ lakāra)) of gam

Imperative mood, 1st person plural.

Root: gam (class 1)

सर्वे (sarve) - all (of us) (all, everyone)

(pronoun)

Nominative, masculine, plural of sarva

sarva - all, every, whole

Masculine nominative plural form.

एव (eva) - indeed, all of us (indeed, certainly, only)

(indeclinable)

Emphatic particle.

पितामहम् (pitāmaham) - to the Grandfather (Brahmā) (to the grandfather, to Brahmā)

(proper noun)

Accusative, masculine, singular of pitāmaha

pitāmaha - paternal grandfather; an epithet of Brahmā

Note: Object of `gacchāmaḥ`.

तत् (tat) - his (referring to Śiva, the potential giver of the boon) (that (singular, neuter); his/her/its (genitive))

(pronoun)

Genitive, masculine, singular of tad

tad - that, he/she/it

Genitive singular of `tad` (masculine). Here, it functions as a possessive pronoun 'his'.

वर (vara) - boon (that Pārvatī seeks) (boon, blessing, choice)

(noun)

masculine, singular of vara

vara - boon, blessing, choice

From root `vṛ` (to choose).

Root: vṛ (class 5)

Note: Part of the compound `tadvara-artham`.

अर्थम् (artham) - for the sake of (purpose, meaning, for the sake of)

(indeclinable)

Often used as an indeclinable suffix to mean 'for the sake of'.

Note: Part of the compound `tadvarārtham`.

अनर्थाय (anarthāya) - for (our) ruin (for calamity, for misfortune, for ruin)

(noun)

Dative, masculine, singular of anartha

anartha - calamity, misfortune, disadvantage, ruin

`a-nartha` (not good purpose).

Compound type : Nañ-Tatpuruṣa (a+artha)

• a – not, non-, un-
  indeclinable
  Negative prefix.
• artha – purpose, good, advantage
  noun (masculine)

Note: Indicates purpose or outcome.

विद्धि (viddhi) - understand! (know! understand!)

(verb)

2nd person , singular, active, imperative (loṭ (Loṭ lakāra)) of vid

Imperative mood, 2nd person singular. `vid` is from the 2nd (adādi) class.

Root: vid (class 2)

तत् (tat) - that (referring to her tapas) (that)

(pronoun)

Accusative, neuter, singular of tad

tad - that

Neuter singular nominative/accusative form.

सुमहत् (sumahat) - supremely great (very great, exceedingly large)

(adjective)

Accusative, neuter, singular of sumahat

sumahat - very great, excellent, exceedingly large

`su` (good, very) + `mahat` (great).

Compound type : Karmadhāraya (su+mahat)

• su – good, well, very, excellent
  indeclinable
  Prefix.
• mahat – great, large, important
  adjective (neuter)
  Present active participle of `mah` (to be great).
  Root: mah (class 1)

Note: Modifies `tapaḥ`.

तपः (tapaḥ) - ascetic practice (tapas) (ascetic practice, penance, austerity)

(noun)

Accusative, neuter, singular of tapas

tapas - heat, ascetic practice, penance, austerity (tapas)

From root `tap` (to heat, to perform austerity) + as.

Root: tap (class 1)

Note: Object of `viddhi`.