योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-118, verse-6

अतिबहुकालविलोलानवलोक्य बकांस्तपोदम्भान् ।
अत्रैवातिमिरस्थांस्तटवनिता विस्मिता धूर्तान् ॥ ६ ॥

atibahukālavilolānavalokya bakāṃstapodambhān ,
atraivātimirasthāṃstaṭavanitā vismitā dhūrtān 6

6. atibahukālavilolān avalokya bakān tapas-dambhān
atra eva atimirasthān taṭavanitā vismitā dhūrtān

6. atra eva taṭavanitā atibahukālavilolān tapas-dambhān
atimirasthān dhūrtān bakān avalokya vismitā

6. Here, indeed, the women on the riverbank were astonished to see the cunning herons, who, having remained motionless for a very long time in the deep shadows, were practicing the pretense of asceticism (tapas).

Words meanings summery:

• अतिबहुकालविलोलान् (atibahukālavilolān) - motionless for a very long time (in pretense) (motionless for a very long time (in pretense), agitated for a very long time)

• अवलोक्य (avalokya) - having seen, observing, perceiving

• बकान् (bakān) - herons, cranes

• तपस्-दम्भान् (tapas-dambhān) - having the pretense of asceticism

• अत्र (atra) - here, in this place

• एव (eva) - indeed, just, only

• अतिमिरस्थान् (atimirasthān) - remaining in deep darkness/shadows

• तटवनिता (taṭavanitā) - women of the bank (river/pond bank)

• विस्मिता (vismitā) - astonished, surprised, amazed

• धूर्तान् (dhūrtān) - cunning, deceitful ones, rogues

Words meanings and morphology

अतिबहुकालविलोलान् (atibahukālavilolān) - motionless for a very long time (in pretense) (motionless for a very long time (in pretense), agitated for a very long time)

(adjective)

Accusative, masculine, plural of atibahukālavilola

atibahukālavilola - motionless for a very long time; agitated for a very long time

Compound type : karmadhāraya (ati+bahu+kāla+vilola)

• ati – very, exceedingly, beyond
  prefix/indeclinable
• bahu – many, much, abundant
  adjective
• kāla – time
  noun (masculine)
• vilola – swaying, agitated, unsteady; motionless (in meditation/pretense)
  adjective

अवलोक्य (avalokya) - having seen, observing, perceiving

(indeclinable)

absolutive (gerund)

derived from root lok with prefix ava

Prefix: ava

Root: lok (class 10)

बकान् (bakān) - herons, cranes

(noun)

Accusative, masculine, plural of baka

baka - heron, crane

तपस्-दम्भान् (tapas-dambhān) - having the pretense of asceticism

(noun)

Accusative, masculine, plural of tapas-dambha

tapas-dambha - pretense of asceticism

Compound type : tatpuruṣa (tapas+dambha)

• tapas – asceticism, penance, austerity (tapas)
  noun (neuter)
• dambha – hypocrisy, pretense, deceit
  noun (masculine)

Note: functioning as an adjective for 'bakān'

अत्र (atra) - here, in this place

(indeclinable)

एव (eva) - indeed, just, only

(indeclinable)

अतिमिरस्थान् (atimirasthān) - remaining in deep darkness/shadows

(adjective)

Accusative, masculine, plural of atimirastha

atimirastha - remaining in deep darkness/shadows

Compound type : tatpuruṣa (ati-mira+stha)

• ati-mira – deep darkness, intense darkness
  noun (neuter)
• stha – standing, staying, situated (suffix)
  adjective
  Root: sthā (class 1)

तटवनिता (taṭavanitā) - women of the bank (river/pond bank)

(noun)

Nominative, feminine, singular of taṭavanitā

taṭavanitā - women of the bank (river/pond bank)

Compound type : tatpuruṣa (taṭa+vanitā)

• taṭa – bank, shore, slope
  noun (masculine)
• vanitā – woman, beloved woman
  noun (feminine)

विस्मिता (vismitā) - astonished, surprised, amazed

(adjective)

Nominative, feminine, singular of vismita

vismita - astonished, surprised, amazed

past passive participle

derived from root smi with prefix vi

Prefix: vi

Root: smi (class 1)

धूर्तान् (dhūrtān) - cunning, deceitful ones, rogues

(adjective)

Accusative, masculine, plural of dhūrta

dhūrta - cunning, deceitful, rogue, cheat

Note: used as a noun referring to the herons