योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-69, verse-46

मनसः स्पन्दनं प्राणः प्राणस्य स्पन्दनं मनः ।
एतौ विहरतो नित्यमन्योन्यं रथसारथी ॥ ४६ ॥

manasaḥ spandanaṃ prāṇaḥ prāṇasya spandanaṃ manaḥ ,
etau viharato nityamanyonyaṃ rathasārathī 46

46. manasaḥ spandanam prāṇaḥ prāṇasya spandanam
manaḥ etau viharataḥ nityam anyonyam rathasārathī

46. manasaḥ spandanam prāṇaḥ; prāṇasya spandanam manaḥ.
etau nityam anyonyam rathasārathī viharataḥ.

46. The vibration of the mind (manas) is the life-breath (prāṇa), and the vibration of the life-breath (prāṇa) is the mind (manas). These two, prāṇa and manas, constantly move about together, mutually acting as the chariot and the charioteer.

Words meanings summery:

• मनसः (manasaḥ) - of the mind

• स्पन्दनम् (spandanam) - vibration, pulsation, tremor, movement

• प्राणः (prāṇaḥ) - life-breath, vital energy

• प्राणस्य (prāṇasya) - of the life-breath, of the vital energy

• स्पन्दनम् (spandanam) - vibration, pulsation, tremor, movement

• मनः (manaḥ) - mind, intellect

• एतौ (etau) - these two (prāṇa and manas) (these two)

• विहरतः (viharataḥ) - they move about, they roam, they act

• नित्यम् (nityam) - always, constantly, eternally

• अन्योन्यम् (anyonyam) - mutually, each other

• रथसारथी (rathasārathī) - chariot and charioteer

Words meanings and morphology

मनसः (manasaḥ) - of the mind

(noun)

Genitive, neuter, singular of manas

manas - mind, intellect, consciousness, heart

Derived from root 'man' (to think).

Root: man (class 4)

स्पन्दनम् (spandanam) - vibration, pulsation, tremor, movement

(noun)

Nominative, neuter, singular of spandana

spandana - vibration, throbbing, agitation

Derived from root 'spand' (to tremble, to throb) with suffix 'ana'.

Root: spand (class 1)

प्राणः (prāṇaḥ) - life-breath, vital energy

(noun)

Nominative, masculine, singular of prāṇa

prāṇa - life-breath, vital energy, spirit, life, respiration

Derived from 'pra' (forth) + root 'an' (to breathe).

Prefix: pra

Root: an (class 2)

प्राणस्य (prāṇasya) - of the life-breath, of the vital energy

(noun)

Genitive, masculine, singular of prāṇa

prāṇa - life-breath, vital energy, spirit, life, respiration

Derived from 'pra' (forth) + root 'an' (to breathe).

Prefix: pra

Root: an (class 2)

स्पन्दनम् (spandanam) - vibration, pulsation, tremor, movement

(noun)

Nominative, neuter, singular of spandana

spandana - vibration, throbbing, agitation

Derived from root 'spand' (to tremble, to throb) with suffix 'ana'.

Root: spand (class 1)

मनः (manaḥ) - mind, intellect

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, consciousness, heart

Derived from root 'man' (to think).

Root: man (class 4)

एतौ (etau) - these two (prāṇa and manas) (these two)

(pronoun)

Nominative, masculine, dual of etas

etas - this, these

विहरतः (viharataḥ) - they move about, they roam, they act

(verb)

3rd person , dual, active, present (lat) of vihṛ

Prefix: vi

Root: hṛ (class 1)

नित्यम् (nityam) - always, constantly, eternally

(indeclinable)

अन्योन्यम् (anyonyam) - mutually, each other

(indeclinable)

Derived from 'anya' (other) + 'anya' (other), forming an adverbial compound.

रथसारथी (rathasārathī) - chariot and charioteer

(noun)

Nominative, masculine, dual of rathasārathi

rathasārathi - chariot and charioteer

Dvandva compound of 'ratha' (chariot) and 'sārathi' (charioteer).

Compound type : dvandva (ratha+sārathi)

• ratha – chariot, car
  noun (masculine)
  Derived from root 'ram' (to delight) or 'raś' (to go).
  Root: ram (class 1)
• sārathi – charioteer, driver
  noun (masculine)
  Derived from 'sa-ratha' (with a chariot) or 'sā' + root 'ṛ' (to go).
  Prefix: sā
  Root: ṛ (class 1)