योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-137, verse-12

ततोऽहं हृदयं तस्य प्रविष्टः प्राणवाजिना ।
संकटस्थः स्वया बुद्ध्या तावेबानुसरोन्तरम् ॥ १२ ॥

tato'haṃ hṛdayaṃ tasya praviṣṭaḥ prāṇavājinā ,
saṃkaṭasthaḥ svayā buddhyā tāvebānusarontaram 12

12. tataḥ aham hṛdayam tasya praviṣṭaḥ prāṇa-vājinā
saṅkaṭasthaḥ svayā buddhyā tau eva anusaraḥ antaram

12. tataḥ aham saṅkaṭasthaḥ prāṇa-vājinā tasya hṛdayam praviṣṭaḥ svayā buddhyā tau eva anusaraḥ antaram ।

12. Then I, finding myself in a critical situation, entered his heart by means of the vital breath (prāṇa) as my steed, and with my own intellect, I, following them, proceeded deeper into the interior.

Words meanings summery:

• ततः (tataḥ) - then, thereafter, from there

• अहम् (aham) - I

• हृदयम् (hṛdayam) - heart

• तस्य (tasya) - of him/it

• प्रविष्टः (praviṣṭaḥ) - entered

• प्राण-वाजिना (prāṇa-vājinā) - by the steed of vital breath (prāṇa)

• सङ्कटस्थः (saṅkaṭasthaḥ) - situated in a critical/difficult situation, distressed

• स्वया (svayā) - by my own

• बुद्ध्या (buddhyā) - by intellect, by understanding

• तौ (tau) - those two

• एव (eva) - indeed, only, very

• अनुसरः (anusaraḥ) - follower, following

• अन्तरम् (antaram) - into the interior, deeper inside

Words meanings and morphology

ततः (tataḥ) - then, thereafter, from there

(indeclinable)

अहम् (aham) - I

(pronoun)

Nominative, singular of aham

aham - I

हृदयम् (hṛdayam) - heart

(noun)

Accusative, neuter, singular of hṛdaya

hṛdaya - heart, mind, core

तस्य (tasya) - of him/it

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

प्रविष्टः (praviṣṭaḥ) - entered

(adjective)

Nominative, masculine, singular of praviṣṭa

praviṣṭa - entered, gone into, approached

Past Passive Participle

Derived from root 'viś' (to enter) with prefix 'pra'.

Prefix: pra

Root: viś (class 6)

प्राण-वाजिना (prāṇa-vājinā) - by the steed of vital breath (prāṇa)

(noun)

Instrumental, masculine, singular of prāṇa-vājin

prāṇa-vājin - vital breath as a horse/vehicle

Compound type : Tatpurusha (prāṇa+vājin)

• prāṇa – vital breath, life force, respiration, prāṇa
  noun (masculine)
  From root 'an' (to breathe) with prefix 'pra'.
  Prefix: pra
  Root: an (class 2)
• vājin – horse, steed, swift, strong
  noun (masculine)
  Root: vaj

सङ्कटस्थः (saṅkaṭasthaḥ) - situated in a critical/difficult situation, distressed

(adjective)

Nominative, masculine, singular of saṅkaṭastha

saṅkaṭastha - standing in danger, distressed, situated in a difficult position

Compound type : Tatpurusha (saṅkaṭa+stha)

• saṅkaṭa – difficulty, distress, danger, narrow pass
  noun (neuter)
• stha – standing, staying, situated, being
  adjective (masculine)
  Derived from root 'sthā' (to stand).
  Root: sthā (class 1)

Note: Agrees with 'aham'.

स्वया (svayā) - by my own

(pronoun)

Instrumental, feminine, singular of sva

sva - own, one's own

Note: Agrees with 'buddhyā'.

बुद्ध्या (buddhyā) - by intellect, by understanding

(noun)

Instrumental, feminine, singular of buddhi

buddhi - intellect, understanding, perception

Root: budh (class 1)

तौ (tau) - those two

(pronoun)

Accusative, masculine, dual of tad

tad - that, he, she, it

Note: Refers to the creature's prāṇa and heart, or two aspects of prāṇa mentioned earlier.

एव (eva) - indeed, only, very

(indeclinable)

अनुसरः (anusaraḥ) - follower, following

(adjective)

Nominative, masculine, singular of anusara

anusara - following, pursuing, a follower

Present Active Participle or Agent Noun

Derived from root 'sṛ' (to go, move) with prefix 'anu'.

Prefix: anu

Root: sṛ (class 1)

Note: Functions adjectivally, agreeing with 'aham'.

अन्तरम् (antaram) - into the interior, deeper inside

(indeclinable)

Note: Used adverbially to indicate 'into the interior'.