महाभारतः mahābhārataḥ - book-6, chapter-28, verse-25

शनैः शनैरुपरमेद्बुद्ध्या धृतिगृहीतया ।
आत्मसंस्थं मनः कृत्वा न किंचिदपि चिन्तयेत् ॥२५॥

25. śanaiḥ śanairuparamedbuddhyā dhṛtigṛhītayā ,
ātmasaṁsthaṁ manaḥ kṛtvā na kiṁcidapi cintayet.

25. śanaiḥ śanaiḥ uparamet buddhyā dhṛtigṛhītayā |
ātmasaṃstham manaḥ kṛtvā na kiṃcit api cintayet

25. dhṛtigṛhītayā buddhyā śanaiḥ śanaiḥ uparamet
manaḥ ātmasaṃstham kṛtvā kiṃcit api na cintayet

25. One should gradually withdraw (the mind) with an intellect (buddhi) endowed with firm conviction (dhṛti). Having established the mind (manas) in the Self (ātman), one should not contemplate anything else.

Words meanings summery:

• शनैः (śanaiḥ) - slowly, gradually

• शनैः (śanaiḥ) - slowly, gradually

• उपरमेत् (uparamet) - one should cease, one should withdraw, one should desist

• बुद्ध्या (buddhyā) - by the intellect, by understanding

• धृतिगृहीतया (dhṛtigṛhītayā) - by an intellect held/guided by firmness (held by firmness, grasped by steadfastness)

• आत्मसंस्थम् (ātmasaṁstham) - established in the Self, fixed in the Self

• मनः (manaḥ) - mind, intellect

• कृत्वा (kṛtvā) - having made, having done

• न (na) - not, no

• किंचित् (kiṁcit) - anything, something

• अपि (api) - even, also, too

• चिन्तयेत् (cintayet) - one should think, one should contemplate

Words meanings and morphology

शनैः (śanaiḥ) - slowly, gradually

(indeclinable)

शनैः (śanaiḥ) - slowly, gradually

(indeclinable)

उपरमेत् (uparamet) - one should cease, one should withdraw, one should desist

(verb)

3rd person , singular, active, optative (liṅ) of uparamet

optative mood

root ram with prefix upa, optative 3rd person singular

Prefix: upa

Root: ram (class 1)

बुद्ध्या (buddhyā) - by the intellect, by understanding

(noun)

Instrumental, feminine, singular of buddhi

buddhi - intellect, understanding, perception, discernment

from root budh

Root: budh (class 1)

धृतिगृहीतया (dhṛtigṛhītayā) - by an intellect held/guided by firmness (held by firmness, grasped by steadfastness)

(adjective)

Instrumental, feminine, singular of dhṛtigṛhīta

dhṛtigṛhīta - held by firmness, grasped by steadfastness

Compound type : tatpuruṣa (dhṛti+gṛhīta)

• dhṛti – firmness, steadfastness, resolve, patience
  noun (feminine)
  from root dhṛ
  Root: dhṛ (class 1)
• gṛhīta – held, grasped, seized, taken
  adjective
  Past Passive Participle
  from root grah with suffix -ta
  Root: grah (class 9)

आत्मसंस्थम् (ātmasaṁstham) - established in the Self, fixed in the Self

(adjective)

Accusative, neuter, singular of ātmasaṃstha

ātmasaṁstha - established in the Self, situated in the Self

Compound type : tatpuruṣa (ātman+saṃstha)

• ātman – Self, soul, spirit, essence
  noun (masculine)
• saṃstha – standing in, established in, situated in
  adjective
  from saṃ-sthā
  Prefix: sam
  Root: sthā (class 1)

मनः (manaḥ) - mind, intellect

(noun)

Accusative, neuter, singular of manas

manas - mind, intellect, consciousness, thought

Root: man (class 4)

कृत्वा (kṛtvā) - having made, having done

(indeclinable)

absolutive

from root kṛ with suffix -tvā

Root: kṛ (class 8)

न (na) - not, no

(indeclinable)

किंचित् (kiṁcit) - anything, something

(pronoun)

Accusative, neuter, singular of kiṃcid

kiṁcid - anything, something, a little

अपि (api) - even, also, too

(indeclinable)

चिन्तयेत् (cintayet) - one should think, one should contemplate

(verb)

3rd person , singular, active, optative (liṅ) of cintayet

optative mood

Class 10 verb (Curādi), optative 3rd person singular

Root: cint (class 10)