योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-23, verse-31

हृत्क्षीरोदकसंस्पन्दमन्दरेषु चलेष्वपि ।
स्वसंकल्पविकल्पेषु न किंचित्सुस्थिरं शुभम् ॥ ३१ ॥

hṛtkṣīrodakasaṃspandamandareṣu caleṣvapi ,
svasaṃkalpavikalpeṣu na kiṃcitsusthiraṃ śubham 31

31. hṛt-kṣīra-udaka-saṃspanda-mandareṣu caleṣu api
sva-saṃkalpa-vikalpeṣu na kiñcit su-sthiraṃ śubham

31. hṛt-kṣīra-udaka-saṃspanda-mandareṣu api caleṣu
sva-saṃkalpa-vikalpeṣu kiñcit su-sthiraṃ śubham na

31. Even amidst one's own changing intentions (saṃkalpa) and doubts, which churn the heart's ocean like the Mandara mountain, nothing is truly stable or auspicious.

Words meanings summery:

• हृत्-क्षीर-उदक-संस्पन्द-मन्दरेषु (hṛt-kṣīra-udaka-saṁspanda-mandareṣu) - (in intentions and doubts) which churn the heart's ocean like the Mandara mountain (in those like Mandara mountains stirring the heart's ocean of milk)

• चलेषु (caleṣu) - in the changing/agitated (intentions and doubts) (in the moving, in the agitated, in the fickle)

• अपि (api) - even amidst (even, also, too)

• स्व-संकल्प-विकल्पेषु (sva-saṁkalpa-vikalpeṣu) - in one's own intentions and doubts (in one's own resolves and doubts)

• न (na) - not (not, no)

• किञ्चित् (kiñcit) - anything (anything, something, a little)

• सु-स्थिरं (su-sthiraṁ) - truly stable (very stable, very firm, very steady)

• शुभम् (śubham) - auspicious (auspicious, good, beautiful, propitious)

Words meanings and morphology

हृत्-क्षीर-उदक-संस्पन्द-मन्दरेषु (hṛt-kṣīra-udaka-saṁspanda-mandareṣu) - (in intentions and doubts) which churn the heart's ocean like the Mandara mountain (in those like Mandara mountains stirring the heart's ocean of milk)

(adjective)

Locative, masculine, plural of hṛt-kṣīra-udaka-saṃspanda-mandara

hṛt-kṣīra-udaka-saṁspanda-mandara - Mandara mountain stirring the heart's ocean of milk

a complex compound referring to the churning of the ocean of milk by the Mandara mountain

Compound type : bahuvrīhi (hṛt+kṣīra-udaka+saṃspanda+mandara)

• hṛd – heart, mind, soul
  noun (neuter)
  `hṛt` is the stem form of `hṛd`
• kṣīra-udaka – milk-water, ocean of milk
  noun (neuter)
  compound of kṣīra (milk) and udaka (water), refers to the mythological ocean of milk
• saṃspanda – stirring, agitation, vibration, throbbing
  noun (masculine)
  derived from root spand (to throb, stir) with prefix sam
  Prefix: sam
  Root: spand (class 1)
• mandara – Mandara mountain (mythological mountain used for churning the ocean)
  proper noun (masculine)

Note: Qualifies `sva-saṃkalpa-vikalpeṣu`.

चलेषु (caleṣu) - in the changing/agitated (intentions and doubts) (in the moving, in the agitated, in the fickle)

(adjective)

Locative, masculine, plural of cala

cala - moving, trembling, agitated, fickle, transient

derived from root cal (to move)

Root: cal (class 1)

Note: Qualifies `sva-saṃkalpa-vikalpeṣu`.

अपि (api) - even amidst (even, also, too)

(indeclinable)

Note: Emphasizes the preceding words.

स्व-संकल्प-विकल्पेषु (sva-saṁkalpa-vikalpeṣu) - in one's own intentions and doubts (in one's own resolves and doubts)

(noun)

Locative, masculine, plural of sva-saṃkalpa-vikalpa

sva-saṁkalpa-vikalpa - one's own resolves and doubts

compound of sva (own), saṃkalpa (resolve) and vikalpa (doubt)

Compound type : dvandva (sva+saṃkalpa+vikalpa)

• sva – own, one's self, personal
  pronoun
• saṃkalpa – resolve, intention, will, determination, conception
  noun (masculine)
  derived from root kḷp (to be able, to arrange) with prefix sam
  Prefix: sam
  Root: kḷp (class 10)
• vikalpa – doubt, indecision, alternative, option, misconception
  noun (masculine)
  derived from root kḷp (to be able, to arrange) with prefix vi
  Prefix: vi
  Root: kḷp (class 10)

Note: Main noun in locative.

न (na) - not (not, no)

(indeclinable)

Note: Negates the statement.

किञ्चित् (kiñcit) - anything (anything, something, a little)

(pronoun)

Nominative, neuter, singular of kiñcit

kiñcit - anything, something, a little, whatsoever

indefinite pronoun, neuter singular nominative/accusative

Note: Subject of the implied verb 'is'.

सु-स्थिरं (su-sthiraṁ) - truly stable (very stable, very firm, very steady)

(adjective)

Nominative, neuter, singular of su-sthira

su-sthira - very stable, very firm, very steady

compound of su (good, very) and sthira (stable)

Compound type : karmadhāraya (su+sthira)

• su – good, well, very, excellent
  indeclinable
  prefix/particle indicating excellence
• sthira – stable, firm, steady, motionless
  adjective (masculine)
  derived from root sthā (to stand)
  Root: sthā (class 1)

Note: Predicate adjective agreeing with `kiñcit`.

शुभम् (śubham) - auspicious (auspicious, good, beautiful, propitious)

(adjective)

Nominative, neuter, singular of śubha

śubha - auspicious, good, beautiful, propitious, shining

Root: śubh (class 1)

Note: Predicate adjective agreeing with `kiñcit`.