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

आब्रह्मस्तम्बपर्यन्तं स्पन्दनैः पवनो यथा ।
उल्लसन्ति निलीयन्ते म्लायन्ति विहसन्ति च ॥ ७ ॥

ābrahmastambaparyantaṃ spandanaiḥ pavano yathā ,
ullasanti nilīyante mlāyanti vihasanti ca 7

7. ābrahmastambaparyantam spandanaiḥ pavanaḥ
yathā ullasanti nilīyante mlāyanti vihasanti ca

7. yathā pavanaḥ spandanaiḥ,
ābrahmastambaparyantam ullasanti nilīyante mlāyanti ca vihasanti ca

7. Like the wind (pavana), all beings from Brahma (brahman) down to a blade of grass (ābrahmastambaparyantam), through their vibrations, blossom, disappear, wither, and laugh.

Words meanings summery:

• आब्रह्मस्तम्बपर्यन्तम् (ābrahmastambaparyantam) - from Brahma down to a blade of grass, embracing all existence from Brahma to a stem

• स्पन्दनैः (spandanaiḥ) - by vibrations, by throbs, by movements

• पवनः (pavanaḥ) - wind, air

• यथा (yathā) - as, like, just as

• उल्लसन्ति (ullasanti) - they blossom, they shine forth, they rejoice

• निलीयन्ते (nilīyante) - they disappear, they hide themselves, they dissolve

• म्लायन्ति (mlāyanti) - they wither, they fade, they languish

• विहसन्ति (vihasanti) - they laugh, they smile broadly, they mock

• च (ca) - and, also

Words meanings and morphology

आब्रह्मस्तम्बपर्यन्तम् (ābrahmastambaparyantam) - from Brahma down to a blade of grass, embracing all existence from Brahma to a stem

(adjective)

Accusative, neuter, singular of ābrahmastambaparyanta

ābrahmastambaparyanta - from Brahma to a blade of grass (i.e., all creation)

Compound type : avyayībhāva (ā+brahma+stamba+paryanta)

• ā – up to, until, including
  indeclinable
• brahma – Brahma (the creator god), sacred power, ultimate reality
  proper noun (masculine)
• stamba – blade of grass, clump, post, pillar
  noun (masculine)
• paryanta – ending at, reaching to, boundary, limit
  noun (masculine)

Note: Used adverbially here.

स्पन्दनैः (spandanaiḥ) - by vibrations, by throbs, by movements

(noun)

Instrumental, neuter, plural of spandana

spandana - vibration, throb, movement, quiver

verbal noun

Derived from root spand (to tremble, vibrate)

Root: spand (class 1)

पवनः (pavanaḥ) - wind, air

(noun)

Nominative, masculine, singular of pavana

pavana - wind, air, purifier

Root: pū (class 1)

यथा (yathā) - as, like, just as

(indeclinable)

उल्लसन्ति (ullasanti) - they blossom, they shine forth, they rejoice

(verb)

3rd person , plural, active, present (lat) of udlas

Prefix: ud

Root: las (class 1)

निलीयन्ते (nilīyante) - they disappear, they hide themselves, they dissolve

(verb)

3rd person , plural, middle, present (lat) of nilī

Prefix: ni

Root: lī (class 4)

म्लायन्ति (mlāyanti) - they wither, they fade, they languish

(verb)

3rd person , plural, active, present (lat) of mlā

Root: mlā (class 1)

विहसन्ति (vihasanti) - they laugh, they smile broadly, they mock

(verb)

3rd person , plural, active, present (lat) of vihas

Prefix: vi

Root: has (class 1)

च (ca) - and, also

(indeclinable)