योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-4, verse-12

अहंभावं नभोर्थेन निर्वाच्यारूढबाणवत् ।
अजस्रमाशु वाऽक्षीणं तिष्ठावष्टब्धतत्पदः ॥ १२ ॥

ahaṃbhāvaṃ nabhorthena nirvācyārūḍhabāṇavat ,
ajasramāśu vā'kṣīṇaṃ tiṣṭhāvaṣṭabdhatatpadaḥ 12

12. ahaṃbhāvam nabhaḥ arthena nirvācya ārūḍhabāṇavat
ajasram āśu vā akṣīṇam tiṣṭha avaṣṭabdhatatpadaḥ

12. ahaṃbhāvam nabhaḥ arthena nirvācya ārūḍhabāṇavat
ajasram vā āśu akṣīṇam avaṣṭabdhatatpadaḥ tiṣṭha

12. Dissolve the ego (ahaṅkāra) into the void, rendering it indescribable like space, and like an arrow that has been shot (and cannot be recalled). Constantly, or swiftly and unfailingly, remain firmly established in that supreme state (tat-pada).

Words meanings summery:

• अहंभावम् (ahaṁbhāvam) - the ego (ahaṅkāra) (the sense of "I", ego)

• नभः (nabhaḥ) - sky, atmosphere, space, void

• अर्थेन (arthena) - by meaning, by purpose, by reason

• निर्वाच्य (nirvācya) - rendered indescribable/void (indescribable, inexpressible, to be spoken of)

• आरूढबाणवत् (ārūḍhabāṇavat) - like an arrow mounted/shot

• अजस्रम् (ajasram) - constantly, perpetually

• आशु (āśu) - quickly, swiftly

• वा (vā) - or, either

• अक्षीणम् (akṣīṇam) - undiminished, unwaning, unfailing

• तिष्ठ (tiṣṭha) - remain, stand, abide

• अवष्टब्धतत्पदः (avaṣṭabdhatatpadaḥ) - firmly established in that supreme state (tat-pada) (firmly established in that supreme state)

Words meanings and morphology

अहंभावम् (ahaṁbhāvam) - the ego (ahaṅkāra) (the sense of "I", ego)

(noun)

Accusative, masculine, singular of ahaṃbhāva

ahaṁbhāva - egoism, self-consciousness, the sense of 'I'

Compound type : tatpurusha (aham+bhāva)

• aham – I
  pronoun
• bhāva – state, condition, existence, nature, feeling
  noun (masculine)
  Root: bhū (class 1)

नभः (nabhaḥ) - sky, atmosphere, space, void

(noun)

Nominative, neuter, singular of nabhas

nabhas - sky, atmosphere, space, void

Note: Used here as part of a conceptual phrase 'nabhaḥ arthena'.

अर्थेन (arthena) - by meaning, by purpose, by reason

(noun)

Instrumental, masculine, singular of artha

artha - meaning, purpose, object, cause, wealth

निर्वाच्य (nirvācya) - rendered indescribable/void (indescribable, inexpressible, to be spoken of)

(adjective)

Accusative, masculine, singular of nirvācya

nirvācya - to be spoken of, describable, indescribable (context dependent)

Gerundive (Potential Passive Participle)

formed from root 'vac' with prefix 'nir-' and suffix '-ya'

Prefix: nir

Root: vac (class 2)

Note: Modifies 'ahaṃbhāvam'.

आरूढबाणवत् (ārūḍhabāṇavat) - like an arrow mounted/shot

(indeclinable)

Formed with the suffix -vat indicating similarity.

Compound type : tatpurusha (ārūḍha+bāṇa)

• ā-rūḍha – mounted, ascended, fixed, shot (of an arrow)
  adjective
  Past Passive Participle
  from root 'ruh' with prefix 'ā-'
  Prefix: ā
  Root: ruh (class 1)
• bāṇa – arrow
  noun (masculine)

अजस्रम् (ajasram) - constantly, perpetually

(adjective)

Accusative, neuter, singular of ajasra

ajasra - constant, perpetual, uninterrupted

Compound type : nañ-tatpuruṣa (a+jasra)

• a – not, non-
  indeclinable
• jasra – exhausted, worn out
  adjective
  Root: jas (class 4)

Note: Used adverbially.

आशु (āśu) - quickly, swiftly

(indeclinable)

वा (vā) - or, either

(indeclinable)

अक्षीणम् (akṣīṇam) - undiminished, unwaning, unfailing

(adjective)

Accusative, neuter, singular of akṣīṇa

akṣīṇa - undiminished, unfailing, imperishable

Compound type : nañ-tatpuruṣa (a+kṣīṇa)

• a – not, non-
  indeclinable
• kṣīṇa – diminished, wasted, destroyed
  adjective
  Past Passive Participle
  from root 'kṣi' (5P)
  Root: kṣi (class 5)

Note: Used adverbially.

तिष्ठ (tiṣṭha) - remain, stand, abide

(verb)

2nd person , singular, active, present imperative (loṭ) of sthā

Root: sthā (class 1)

अवष्टब्धतत्पदः (avaṣṭabdhatatpadaḥ) - firmly established in that supreme state (tat-pada) (firmly established in that supreme state)

(adjective)

Nominative, masculine, singular of avaṣṭabdhatatpada

avaṣṭabdhatatpada - one whose 'that state' (the supreme state) is supported/firmly established

Compound type : bahuvrihi (avaṣṭabdha+tat+pada)

• avaṣṭabdha – supported, fixed, firm
  adjective
  Past Passive Participle
  from root 'stambh' with prefix 'ava-'
  Prefix: ava
  Root: stambh (class 5)
• tat – that, it
  pronoun (neuter)
• pada – state, condition, foot, abode
  noun (neuter)