योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-80, verse-40

ऊरोर्भ्रूमध्यरन्ध्राणि स्पृशन्ती वृत्तिचञ्चला ।
अनारतं च सस्पन्दा पवमानेन तिष्ठति ॥ ४० ॥

ūrorbhrūmadhyarandhrāṇi spṛśantī vṛtticañcalā ,
anārataṃ ca saspandā pavamānena tiṣṭhati 40

40. ūroḥ bhrūmadhyarandhrāṇi spṛśantī vṛtticañcalā
anāratam ca saspandā pavamānena tiṣṭhati

40. spṛśantī ūroḥ bhrūmadhyarandhrāṇi vṛtticañcalā
ca anāratam saspandā pavamānena tiṣṭhati

40. She (the Kundalini) touches the channels from the region of the thighs (ūru) up to the openings in the center of the eyebrows (bhrūmadhya), and is restless in her activity (vṛtti). And, continuously pulsating (saspandā), she remains vibrant, moved by the vital air (pavamāna).

Words meanings summery:

• ऊरोः (ūroḥ) - From the Muladhara cakra region (base of the spine/perineum) (from the thigh, from the lower region)

• भ्रूमध्यरन्ध्राणि (bhrūmadhyarandhrāṇi) - Refers to subtle channels leading up to the Ajna cakra (third eye center). (the openings/channels in the center of the eyebrows)

• स्पृशन्ती (spṛśantī) - Refers to Kundalini śakti extending upwards through the subtle body. (touching, reaching, extending to)

• वृत्तिचञ्चला (vṛtticañcalā) - unsteady in movement, restless in activity

• अनारतम् (anāratam) - incessantly, continuously

• च (ca) - and, also

• सस्पन्दा (saspandā) - Refers to the Kundalini śakti's inherent vibratory nature. (vibrating, pulsating)

• पवमानेन (pavamānena) - By Prāṇa (the life-force or vital breath). (by the vital air, by the wind)

• तिष्ठति (tiṣṭhati) - she stands, she remains, she exists

Words meanings and morphology

ऊरोः (ūroḥ) - From the Muladhara cakra region (base of the spine/perineum) (from the thigh, from the lower region)

(noun)

Ablative, masculine, singular of ūru

ūru - thigh, hip, broader region (often referring to the muladhara chakra in yogic texts)

भ्रूमध्यरन्ध्राणि (bhrūmadhyarandhrāṇi) - Refers to subtle channels leading up to the Ajna cakra (third eye center). (the openings/channels in the center of the eyebrows)

(noun)

Accusative, neuter, plural of bhrūmadhyarandhra

bhrūmadhyarandhra - openings in the center of the eyebrows

Compound type : tatpurusha (bhrū+madhya+randhra)

• bhrū – eyebrow
  noun (feminine)
• madhya – middle, center
  noun (neuter)
• randhra – opening, hole, weak point, channel
  noun (neuter)

Note: Object of spṛśantī.

स्पृशन्ती (spṛśantī) - Refers to Kundalini śakti extending upwards through the subtle body. (touching, reaching, extending to)

(adjective)

Nominative, feminine, singular of spṛśat

spṛśat - touching, feeling

Present Active Participle

From root spṛś (to touch) with śatṛ suffix.

Root: spṛś (class 6)

Note: Qualifies the implied subject, śakti.

वृत्तिचञ्चला (vṛtticañcalā) - unsteady in movement, restless in activity

(adjective)

Nominative, feminine, singular of vṛtticañcala

vṛtticañcala - unsteady in movement, restless in activity

Compound type : tatpurusha (vṛtti+cañcala)

• vṛtti – activity, movement, function
  noun (feminine)
  From root vṛt (to turn, exist)
  Root: vṛt (class 1)
• cañcala – unsteady, trembling, restless
  adjective (masculine)
  Derived from cal (to move)
  Root: cal (class 1)

Note: Qualifies the implied subject, śakti.

अनारतम् (anāratam) - incessantly, continuously

(indeclinable)

Adverbial form of anārata (without cessation); an (negation) + ā-rata (stopped).

Prefixes: an+ā

Root: ram (class 1)

च (ca) - and, also

(indeclinable)

सस्पन्दा (saspandā) - Refers to the Kundalini śakti's inherent vibratory nature. (vibrating, pulsating)

(adjective)

Nominative, feminine, singular of saspanda

saspanda - with vibration, pulsating, throbbing

From sa (with) + spanda (vibration).

Compound type : bahuvrihi (sa+spanda)

• sa – with, together with
  indeclinable
  Prefix indicating accompaniment
• spanda – vibration, throb, movement
  noun (masculine)
  From root spand (to vibrate)
  Root: spand (class 1)

Note: Qualifies the implied subject, śakti.

पवमानेन (pavamānena) - By Prāṇa (the life-force or vital breath). (by the vital air, by the wind)

(noun)

Instrumental, masculine, singular of pavamāna

pavamāna - wind, vital air, pure (literally 'being purified')

Present Middle Participle

From root pū (to purify, blow) with śānac suffix. Often refers to Vāyu or Prāṇa.

Root: pū (class 1)

Note: Agent of the action.

तिष्ठति (tiṣṭhati) - she stands, she remains, she exists

(verb)

3rd person , singular, active, present (laṭ) of sthā

Present Tense

Root sthā in the tiṣṭha- form (reduplication and nasalization, class 1).

Root: sthā (class 1)

Note: Subject is implicitly the Kundalini śakti.