योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-55, verse-20

तस्थौ समसमाभोगः परां विश्रान्तिमागतः ।
अनानन्दसमानन्दमुग्धमुग्धमुखद्युतिः ॥ २० ॥

tasthau samasamābhogaḥ parāṃ viśrāntimāgataḥ ,
anānandasamānandamugdhamugdhamukhadyutiḥ 20

20. tasthau samasamābhogaḥ parām viśrāntim āgataḥ
anānandasamanandamugdhamugdhamukhadyutiḥ

20. [saḥ] tasthau,
parām viśrāntim āgataḥ,
samasamābhogaḥ,
anānandasamanandamugdhamugdhamukhadyutiḥ [ca].

20. He remained, having attained supreme repose, experiencing perfect equanimity, and his facial radiance was utterly charming with a uniform joy that was free from all unhappiness.

Words meanings summery:

• तस्थौ (tasthau) - he settled or continued in that state (he stood; he remained; he stayed)

• समसमाभोगः (samasamābhogaḥ) - one who experiences equanimity in all circumstances (one whose enjoyment is perfectly equal; one who has uniform experience)

• पराम् (parām) - supreme; highest; ultimate

• विश्रान्तिम् (viśrāntim) - ultimate peace or cessation of activity (rest; repose; tranquility; cessation)

• आगतः (āgataḥ) - having reached or achieved (the state of repose) (having come; having arrived; having attained)

• अनानन्दसमनन्दमुग्धमुग्धमुखद्युतिः (anānandasamanandamugdhamugdhamukhadyutiḥ) - describing the blissful and serene appearance (whose facial radiance was utterly charming with an equal bliss that was free from sorrow)

Words meanings and morphology

तस्थौ (tasthau) - he settled or continued in that state (he stood; he remained; he stayed)

(verb)

3rd person , singular, active, past perfect (liṭ) of sthā

Reduplicated perfect (liṭ) form.

Root: sthā (class 1)

समसमाभोगः (samasamābhogaḥ) - one who experiences equanimity in all circumstances (one whose enjoyment is perfectly equal; one who has uniform experience)

(adjective)

Nominative, masculine, singular of samasamābhoga

samasamābhoga - having perfectly equal experience/enjoyment

Compound type : bahuvrihi (sama+sama+ābhoga)

• sama – equal; same; uniform; tranquil
  adjective
• ābhoga – enjoyment; experience; full comprehension; expansion
  noun (masculine)
  From ā-bhuj- 'to enjoy'
  Prefix: ā
  Root: bhuj (class 7)

Note: Refers to the subject of `tasthau`.

पराम् (parām) - supreme; highest; ultimate

(adjective)

Accusative, feminine, singular of parā

para - supreme; highest; ultimate; other

Feminine form `parā`.

Note: Modifies `viśrāntim`.

विश्रान्तिम् (viśrāntim) - ultimate peace or cessation of activity (rest; repose; tranquility; cessation)

(noun)

Accusative, feminine, singular of viśrānti

viśrānti - rest; repose; tranquility; cessation

From vi-śram- 'to rest'.

Prefix: vi

Root: śram (class 4)

Note: Object of `āgataḥ`.

आगतः (āgataḥ) - having reached or achieved (the state of repose) (having come; having arrived; having attained)

(adjective)

Nominative, masculine, singular of āgata

āgata - arrived; come; attained; reached

Past Passive Participle

From ā-gam- 'to come'.

Prefix: ā

Root: gam (class 1)

Note: Qualifies the subject of `tasthau`.

अनानन्दसमनन्दमुग्धमुग्धमुखद्युतिः (anānandasamanandamugdhamugdhamukhadyutiḥ) - describing the blissful and serene appearance (whose facial radiance was utterly charming with an equal bliss that was free from sorrow)

(adjective)

Nominative, masculine, singular of anānandasamanandamugdhamugdhamukhadyuti

anānandasamanandamugdhamugdhamukhadyuti - having a facial radiance that is utterly charming with an equal, non-sorrowful bliss

Compound type : bahuvrihi (anānanda+samānanda+mugdhamugdha+mukhadyuti)

• anānanda – devoid of unhappiness; non-sorrowful
  adjective
  Negative particle 'a' + ānanda
• ānanda – bliss; joy; happiness
  noun (masculine)
  From ā-nand- 'to rejoice'
  Prefix: ā
  Root: nand (class 1)
• samānanda – equal bliss; uniform joy; harmonious happiness
  adjective
  Sama (equal) + ānanda (bliss)
• mugdhamugdha – utterly charming; beautifully captivating; very innocent
  adjective
  Repetition for emphasis
• mukha – face; mouth
  noun (neuter)
• dyuti – radiance; splendor; brightness; glow
  noun (feminine)
  From root dyut 'to shine'
  Root: dyut (class 1)

Note: Refers to the subject of `tasthau`.