योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-110, verse-28

मनोऽन्तश्चलति व्यर्थं मननैषणमुह्यया ।
बहिर्गिरिसरिद्व्योमसमुद्रपुरलीलया ॥ २८ ॥

mano'ntaścalati vyarthaṃ mananaiṣaṇamuhyayā ,
bahirgirisaridvyomasamudrapuralīlayā 28

28. manaḥ antaḥ calati vyartham mananaiṣaṇamuhyayā
bahiḥ girisaridvyomasamudrapuralīlayā

28. mūkam api dehasamam jaḍam manaḥ antaḥ mananaiṣaṇamuhyayā
vyartham calati ca bahiḥ girisaridvyomasamudrapuralīlayā

28. ...even the mind, though dumb, inert as a body, and dull, fruitlessly moves inwardly, deluded by thinking and desiring, and outwardly, through the playful activities of mountains, rivers, sky, oceans, and cities.

Words meanings summery:

• मनः (manaḥ) - mind, intellect, heart, consciousness

• अन्तः (antaḥ) - within, inside, inwardly

• चलति (calati) - moves, wanders, stirs, proceeds

• व्यर्थम् (vyartham) - uselessly, in vain, fruitlessly

• मननैषणमुह्यया (mananaiṣaṇamuhyayā) - by the delusion of thinking and desiring

• बहिः (bahiḥ) - outside, externally, outwardly

• गिरिसरिद्व्योमसमुद्रपुरलीलया (girisaridvyomasamudrapuralīlayā) - by the playful activity of mountains, rivers, sky, oceans, and cities

Words meanings and morphology

मनः (manaḥ) - mind, intellect, heart, consciousness

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, thought, understanding

Root: man (class 4)

अन्तः (antaḥ) - within, inside, inwardly

(indeclinable)

चलति (calati) - moves, wanders, stirs, proceeds

(verb)

3rd person , singular, active, present indicative (laṭ) of cal

Root: cal (class 1)

व्यर्थम् (vyartham) - uselessly, in vain, fruitlessly

(indeclinable)

मननैषणमुह्यया (mananaiṣaṇamuhyayā) - by the delusion of thinking and desiring

(noun)

Instrumental, feminine, singular of mananaiṣaṇamūhyā

mananaiṣaṇamūhyā - delusion arising from thinking and desiring

Compound type : Tatpurusha (manana+eṣaṇā+mūhyā)

• manana – thinking, cogitation, reflection, meditation
  noun (neuter)
  Verbal noun
  Derived from root 'man'.
  Root: man (class 4)
• eṣaṇā – desire, longing, seeking, investigation
  noun (feminine)
  Derived from root 'iṣ'.
  Root: iṣ (class 6)
• mūhyā – delusion, confusion, bewilderment
  noun (feminine)
  Derived from root 'muh' (to be bewildered).
  Root: muh (class 4)

बहिः (bahiḥ) - outside, externally, outwardly

(indeclinable)

गिरिसरिद्व्योमसमुद्रपुरलीलया (girisaridvyomasamudrapuralīlayā) - by the playful activity of mountains, rivers, sky, oceans, and cities

(noun)

Instrumental, feminine, singular of girisaridvyomasamudrapuralīlā

girisaridvyomasamudrapuralīlā - the sport or play of mountains, rivers, sky, oceans, and cities

Compound type : Dwandwa-Tatpurusha (giri+sarit+vyoman+samudra+pura+līlā)

• giri – mountain, hill
  noun (masculine)
• sarit – river, stream
  noun (feminine)
  Derived from root 'sṛ'.
  Root: sṛ (class 1)
• vyoman – sky, space, atmosphere, ether
  noun (neuter)
• samudra – ocean, sea
  noun (masculine)
• pura – city, town, fortress
  noun (neuter)
• līlā – play, sport, amusement, divine play
  noun (feminine)