योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-32, verse-2

प्राक्तनैस्तैर्निहन्त्येव स्वमनोमननेहितैः ।
कर्मव्रातैर्विचित्रेहैः परिपीवरतां गतैः ॥ २ ॥

prāktanaistairnihantyeva svamanomananehitaiḥ ,
karmavrātairvicitrehaiḥ paripīvaratāṃ gataiḥ 2

2. prāktanaiḥ taiḥ nihanti eva svamanomananehitaiḥ
karmavrātataiḥ vicitraihaiḥ paripīvaratām gataiḥ

2. prāktanaiḥ taiḥ svamanomananehitaiḥ karmavrātataiḥ
vicitraihaiḥ paripīvaratām gataiḥ eva nihanti

2. Indeed, it (the path to the supreme designation) is obstructed by past accumulated actions (karma), by desires and mental processes originating from one's own mind, and by the diverse endeavors within a multitude of actions (karma) that have become greatly intensified.

Words meanings summery:

• प्राक्तनैः (prāktanaiḥ) - by past (actions) (by former, by previous, by past)

• तैः (taiḥ) - by those (past actions/efforts) (by them)

• निहन्ति (nihanti) - obstructs, destroys (understood as passive in translation) (destroys, kills, strikes down)

• एव (eva) - indeed, certainly (indeed, just, only)

• स्वमनोमननेहितैः (svamanomananehitaiḥ) - by desires and mental processes originating from one's own mind (by efforts/desires arising from one's own mind and cogitation)

• कर्मव्राततैः (karmavrātataiḥ) - by multitudes of actions (karma)

• विचित्रैहैः (vicitraihaiḥ) - by diverse endeavors (by diverse efforts/endeavors)

• परिपीवरताम् (paripīvaratām) - excessive growth, greatly intensified state (excessive fullness, stoutness, great growth)

• गतैः (gataiḥ) - by those that have attained (excessive growth) (by those who have gone, by those who have attained)

Words meanings and morphology

प्राक्तनैः (prāktanaiḥ) - by past (actions) (by former, by previous, by past)

(adjective)

Instrumental, masculine/neuter, plural of prāktana

prāktana - former, previous, past, ancient

From 'prāk' (before) + 'tana' suffix

तैः (taiḥ) - by those (past actions/efforts) (by them)

(pronoun)

Instrumental, masculine/neuter, plural of tad

tad - that, this, he, she, it

Note: Instrumental plural of 'tad', referring to the actions/efforts.

निहन्ति (nihanti) - obstructs, destroys (understood as passive in translation) (destroys, kills, strikes down)

(verb)

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

From root 'han' with prefix 'ni'.

Prefix: ni

Root: han (class 2)

Note: Verb whose subject is likely an unstated 'it' (the 'kāryakāriṇī' principle or its progress), and the instrumentals describe the means of obstruction.

एव (eva) - indeed, certainly (indeed, just, only)

(indeclinable)

स्वमनोमननेहितैः (svamanomananehitaiḥ) - by desires and mental processes originating from one's own mind (by efforts/desires arising from one's own mind and cogitation)

(noun)

Instrumental, masculine/neuter, plural of svamanomananehita

svamanomananehita - desired by one's own mind and thought, efforts of one's own mind and cogitation

Compound type : Tatpuruṣa (sva+manas+manana+īhita)

• sva – own, self
  pronoun/adjective
• manas – mind, intellect
  noun (neuter)
  Root: man (class 4)
• manana – thinking, cogitation, reflection
  noun (neuter)
  from root 'man'
  Root: man (class 4)
• īhita – desired, sought, effort, endeavor
  noun/adjective (neuter)
  Past Passive Participle of root 'īh'
  from root 'īh'
  Root: īh (class 1)

कर्मव्राततैः (karmavrātataiḥ) - by multitudes of actions (karma)

(noun)

Instrumental, neuter, plural of karmavrāta

karmavrāta - multitude of actions, collection of deeds

Compound type : Tatpuruṣa (karma+vrāta)

• karma – action, deed, work, ritual
  noun (neuter)
  from root 'kṛ'
  Root: kṛ (class 8)
• vrāta – multitude, collection, troop, host
  noun (neuter)

विचित्रैहैः (vicitraihaiḥ) - by diverse endeavors (by diverse efforts/endeavors)

(noun)

Instrumental, neuter, plural of vicitraiha

vicitraiha - diverse efforts/endeavors

Compound type : Karmadhāraya (vicitra+īhā)

• vicitra – diverse, variegated, wonderful
  adjective
• īhā – effort, endeavor, desire, activity
  noun (feminine)
  from root 'īh'
  Root: īh (class 1)

Note: Adjective agreeing with 'karmavrātataiḥ' or another implied noun.

परिपीवरताम् (paripīvaratām) - excessive growth, greatly intensified state (excessive fullness, stoutness, great growth)

(noun)

Accusative, feminine, singular of paripīvaratā

paripīvaratā - excessive fullness, stoutness, great growth, extreme development

From 'pari' (around, excessively) + 'pīvara' (fat, full) + 'tā' (abstract suffix)

Compound type : Avyayībhāva (pari+pīvaratā)

• pari – around, completely, excessively
  indeclinable
• pīvaratā – fullness, stoutness, fatness
  noun (feminine)
  from adjective 'pīvara' + suffix '-tā'

Note: Object of 'gataiḥ' (having attained).

गतैः (gataiḥ) - by those that have attained (excessive growth) (by those who have gone, by those who have attained)

(adjective)

Instrumental, masculine/neuter, plural of gata

gata - gone, attained, reached, become

Past Passive Participle

From root 'gam' + 'kta' suffix.

Root: gam (class 1)

Note: Describes the nature of the instrumentals: they are 'those which have attained paripīvaratām'.