Haṭha Yoga Pradīpikā / 2.62 As the smith's bellows

2.62

Haṭha (हठ) Yoga Pradīpikā (प्रदीपिका)

पुनर् विरेचयेत् तद्वत् पूरयेच् च पुनः पुनः ।
यथैव लोहकारेण भस्त्रा वेगेन चाल्यते
punar virecayet tadvat pūrayec ca punaḥ punaḥ |
yathaiva lohakāreṇa bhastrā vegena cālyate

The line

He should empty again in that way, and fill again and again, just as the smith's bellows is driven quickly.

नेपालीमा

उसले त्यसै गरी फेरि खाली गर्नुपर्छ र बारम्बार भर्नुपर्छ, जसरी लोहारको धौंकनी छिटो चलाइन्छ।

Where it sits

The simile is the verse's own. Bhastrā (भस्त्रा) is the bellows. The same image named kapālabhāti (कपालभाति) at 2.35.

Split: punar (पुनर्) virecayet (विरेचयेत्) tadvat (तद्वत्) pūrayec (पूरयेच्) ca (च) punaḥ (पुनः) punaḥ (पुनः) / yathaiva (यथैव) lohakāreṇa (लोहकारेण) bhastrā (भस्त्रा) vegena (वेगेन) cālyate (चाल्यते)

Sanskrit, in depth

The words

WordGrammarSense
punar (पुनर्)indeclinableagain.
virecayet (विरेचयेत्)optativeone should breathe out.
tadvat (तद्वत्)form in the lineas this verse uses the word.
pūrayec (पूरयेच्)form in the lineas this verse uses the word.
ca (च)indeclinableand.
punaḥ (पुनः)indeclinableagain.
yathaiva (यथैव)indeclinablejust as.
lohakāreṇa (लोहकारेण)instrumental singulara blacksmith.
bhastrā (भस्त्रा)nominative singularthe bellows.
vegena (वेगेन)instrumental singularwith speed.
cālyate (चाल्यते)presentas this verse uses the word.

Sanskrit in this line

The quarters run 16, 16 syllables. A hyphen in the split is a compound joint, a teaching mark, and the voice joins it.

Say it back

Cover the English and say the verse in one sentence. He should empty again in that way, and fill again and again, just as the smith's bellows is driven quickly.