योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-105, verse-12

तुच्छालम्बनमालूनविशीर्णं लोकवृत्तिषु ।
मनो मोहमुपादत्ते न महत्त्वविजृम्भितम् ॥ १२ ॥

tucchālambanamālūnaviśīrṇaṃ lokavṛttiṣu ,
mano mohamupādatte na mahattvavijṛmbhitam 12

12. tucchālambanamālūnaviśīrṇam lokavṛttiṣu
manaḥ moham upādatte na mahattvavijṛmbhitam

12. tucchālambanamālūnaviśīrṇam lokavṛttiṣu manaḥ moham upādatte,
mahattvavijṛmbhitam na (upādatte).

12. The mind, having trivial supports, withered and decaying amidst worldly pursuits, embraces delusion (moha), not that which manifests greatness.

Words meanings summery:

• तुच्छालम्बनमालूनविशीर्णम् (tucchālambanamālūnaviśīrṇam) - referring to the mind, which relies on insignificant things and is in a state of deterioration (whose support is trivial, and which is withered and decayed)

• लोकवृत्तिषु (lokavṛttiṣu) - amidst the various activities and customs of people (in worldly affairs; in the ways of the world)

• मनः (manaḥ) - the mind (mind)

• मोहम् (moham) - a state of mental bewilderment or illusion (moha) (delusion, confusion, infatuation)

• उपादत्ते (upādatte) - grasps, embraces, takes hold of (takes up, accepts, assumes, obtains)

• न (na) - not (not, no)

• महत्त्व-विजृम्भितम् (mahattva-vijṛmbhitam) - that which is characterized by the display of greatness (expanded by greatness; manifested by greatness)

Words meanings and morphology

तुच्छालम्बनमालूनविशीर्णम् (tucchālambanamālūnaviśīrṇam) - referring to the mind, which relies on insignificant things and is in a state of deterioration (whose support is trivial, and which is withered and decayed)

(adjective)

Nominative, neuter, singular of tucchālambanamālūnaviśīrṇa

tucchālambanamālūnaviśīrṇa - characterized by trivial support and being withered/decayed

Compound of tucchālambana and mālūnaviśīrṇa.

Compound type : Karmadhāraya (tucchālambana+mālūnaviśīrṇa)

• tucchālambana – having trivial support/basis
  adjective
  Compound of tuccha and ālambana.
• mālūnaviśīrṇa – withered and dilapidated; plucked (weakened) and decayed
  adjective
  Compound of mālūna and viśīrṇa.

Note: Agrees with manaḥ.

लोकवृत्तिषु (lokavṛttiṣu) - amidst the various activities and customs of people (in worldly affairs; in the ways of the world)

(noun)

Locative, feminine, plural of lokavṛtti

lokavṛtti - worldly activity/conduct/custom

loka (world) + vṛtti (activity, conduct, custom).

Compound type : Tatpuruṣa (loka+vṛtti)

• loka – world, people, realm
  noun (masculine)
  From root lok (to see, perceive).
  Root: lok (class 1)
• vṛtti – activity, conduct, custom, livelihood, function
  noun (feminine)
  From root vṛt (to turn, exist).
  Root: vṛt (class 1)

मनः (manaḥ) - the mind (mind)

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, understanding, heart

From root man (to think).

Root: man (class 4)

मोहम् (moham) - a state of mental bewilderment or illusion (moha) (delusion, confusion, infatuation)

(noun)

Accusative, masculine, singular of moha

moha - delusion, confusion, bewilderment, infatuation (moha)

From root muh (to be bewildered).

Root: muh (class 4)

Note: Object of upādatte.

उपादत्ते (upādatte) - grasps, embraces, takes hold of (takes up, accepts, assumes, obtains)

(verb)

3rd person , singular, middle, present (laṭ) of upādā

Present middle indicative.

From root dā (to give, take) with prefixes upa and ā.

Prefixes: upa+ā

Root: dā (class 3)

न (na) - not (not, no)

(indeclinable)

Particle of negation.

महत्त्व-विजृम्भितम् (mahattva-vijṛmbhitam) - that which is characterized by the display of greatness (expanded by greatness; manifested by greatness)

(adjective)

Accusative, neuter, singular of mahattva-vijṛmbhita

mahattva-vijṛmbhita - manifested by greatness; expanded by greatness

Past Passive Participle

mahattva (greatness) + vijṛmbhita (expanded, manifested).

Compound type : Tatpuruṣa (mahattva+vijṛmbhita)

• mahattva – greatness, magnanimity, importance
  noun (neuter)
  From mahat (great) + tva (suffix for abstract noun).
• vijṛmbhita – expanded, manifested, yawned, bloomed
  adjective
  Past Passive Participle
  From root jṛmbh (to yawn, expand) with prefix vi.
  Prefix: vi
  Root: jṛmbh (class 1)

Note: This is what the mind does not take up.