योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-25, verse-33

हृदाकाशोन्मुखोऽपानो निम्ने वहति वारिवत् ।
अपानश्चन्द्रमा देहमाप्याययति बाह्यतः ॥ ३३ ॥

hṛdākāśonmukho'pāno nimne vahati vārivat ,
apānaścandramā dehamāpyāyayati bāhyataḥ 33

33. hṛdākāśonmukhaḥ apānaḥ nimne vahati vārivat
apānaḥ ca candramāḥ deham āpyāyayati bāhyataḥ

33. apānaḥ hṛdākāśonmukhaḥ nimne vārivat vahati
ca apānaḥ candramāḥ deham bāhyataḥ āpyāyayati

33. Apāna (life-force), directed towards the heart-space, flows downwards like water. And this apāna, like the moon, nourishes the body from the outside.

Words meanings summery:

• हृदाकाशोन्मुखः (hṛdākāśonmukhaḥ) - facing the heart-space, directed towards the space of the heart

• अपानः (apānaḥ) - downward-moving life-force (apāna) (downward-moving vital air)

• निम्ने (nimne) - in the lower region, downwards

• वहति (vahati) - flows, carries, bears

• वारिवत् (vārivat) - like water

• अपानः (apānaḥ) - downward-moving life-force (apāna) (downward-moving vital air)

• च (ca) - and, also

• चन्द्रमाः (candramāḥ) - moon

• देहम् (deham) - body

• आप्याययति (āpyāyayati) - nourishes, causes to swell, invigorates

• बाह्यतः (bāhyataḥ) - from outside, externally

Words meanings and morphology

हृदाकाशोन्मुखः (hṛdākāśonmukhaḥ) - facing the heart-space, directed towards the space of the heart

(adjective)

Nominative, masculine, singular of hṛdākāśonmukha

hṛdākāśonmukha - facing the heart-space, directed towards the space of the heart

Compound type : tatpuruṣa (hṛd+ākāśa+unmukha)

• hṛd – heart
  noun (neuter)
• ākāśa – space, ether (ākāśa)
  noun (masculine)
• unmukha – facing towards, having the face upwards, directed towards
  adjective
  Prefix: ud

अपानः (apānaḥ) - downward-moving life-force (apāna) (downward-moving vital air)

(noun)

Nominative, masculine, singular of apāna

apāna - downward-moving vital air, one of the five prāṇas

Prefix: apa

Root: an (class 2)

निम्ने (nimne) - in the lower region, downwards

(noun)

Locative, neuter, singular of nimna

nimna - low, deep, sunken, lower region

वहति (vahati) - flows, carries, bears

(verb)

3rd person , singular, active, present indicative (laṭ) of vah

Root: vah (class 1)

वारिवत् (vārivat) - like water

(indeclinable)

Formed by adding the suffix -vat to vāri (water).

अपानः (apānaḥ) - downward-moving life-force (apāna) (downward-moving vital air)

(noun)

Nominative, masculine, singular of apāna

apāna - downward-moving vital air, one of the five prāṇas

Prefix: apa

Root: an (class 2)

च (ca) - and, also

(indeclinable)

चन्द्रमाः (candramāḥ) - moon

(noun)

Nominative, masculine, singular of candramas

candramas - moon, lunar deity

देहम् (deham) - body

(noun)

Accusative, masculine, singular of deha

deha - body, form, physical frame

आप्याययति (āpyāyayati) - nourishes, causes to swell, invigorates

(verb)

3rd person , singular, active, present indicative (laṭ) of āpyāyay

Causative

Causative stem of ā + √pyāy (to swell, to grow).

Prefix: ā

Root: pyāy (class 1)

बाह्यतः (bāhyataḥ) - from outside, externally

(indeclinable)

Formed by adding the suffix -tas to bāhya (external).