योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-13, verse-7

कर्मणा तेनतेनैषा विस्तारमनुगच्छति ।
दोषाशीविषवेगस्य यत्क्षीरं विस्तरायते ॥ ७ ॥

karmaṇā tenatenaiṣā vistāramanugacchati ,
doṣāśīviṣavegasya yatkṣīraṃ vistarāyate 7

7. karmaṇā tena tena eṣā vistāram anugacchati
doṣa-āśīviṣa-vegasya yat kṣīram vistārāyate

7. This (tendency or situation) grows and spreads through each such action (karma), just as milk enhances the virulence of the fault-serpent's venom.

Words meanings summery:

• कर्मणा (karmaṇā) - by action, by deed

• तेन (tena) - by that

• तेन (tena) - by that (emphatic repetition, each)

• एषा (eṣā) - Refers to the 'foolish and obstinate person' or the situation described in the previous verse. (this (feminine))

• विस्तारम् (vistāram) - expansion, growth, spread

• अनुगच्छति (anugacchati) - follows, undergoes, experiences

• दोष-आशीविष-वेगस्य (doṣa-āśīviṣa-vegasya) - of the virulence of the fault-serpent's venom

• यत् (yat) - which, just as

• क्षीरम् (kṣīram) - milk

• विस्तारायते (vistārāyate) - causes expansion, makes widespread, spreads

Words meanings and morphology

कर्मणा (karmaṇā) - by action, by deed

(noun)

Instrumental, neuter, singular of karma

karma - action, deed, work, ritual action, fate, consequence of action

Derived from √kṛ (to do) with suffix -man

Root: √kṛ (class 8)

तेन (tena) - by that

(pronoun)

Instrumental, neuter, singular of tad

tad - that, he, she, it

तेन (tena) - by that (emphatic repetition, each)

(pronoun)

Instrumental, neuter, singular of tad

tad - that, he, she, it

एषा (eṣā) - Refers to the 'foolish and obstinate person' or the situation described in the previous verse. (this (feminine))

(pronoun)

Nominative, feminine, singular of etad

etad - this (near speaker)

विस्तारम् (vistāram) - expansion, growth, spread

(noun)

Accusative, masculine, singular of vistāra

vistāra - expansion, extent, diffusion, detailed explanation

Derived from 'vi-√stṛ' (to spread, extend)

Prefix: vi

Root: √stṛ (class 5)

अनुगच्छति (anugacchati) - follows, undergoes, experiences

(verb)

3rd person , singular, active, present (lat) of anugam

Prefix: anu

Root: √gam (class 1)

दोष-आशीविष-वेगस्य (doṣa-āśīviṣa-vegasya) - of the virulence of the fault-serpent's venom

(noun)

Genitive, masculine, singular of doṣa-āśīviṣa-vega

doṣa-āśīviṣa-vega - the virulence of the venomous snake of faults

Compound type : ṣaṣṭhī-tatpurusha (doṣa-āśīviṣa+vega)

• doṣa-āśīviṣa – fault-serpent, a venomous snake representing a fault
  compound noun (masculine)
• vega – speed, force, impulse, virulence, onset
  noun (masculine)
  Derived from √vij (to move rapidly)
  Root: √vij (class 6)

यत् (yat) - which, just as

(indeclinable)

क्षीरम् (kṣīram) - milk

(noun)

Nominative, neuter, singular of kṣīra

kṣīra - milk

विस्तारायते (vistārāyate) - causes expansion, makes widespread, spreads

(verb)

3rd person , singular, middle, present (lat) of vistārāy

Denominative verb

Derived from the noun 'vistāra' with the denominative suffix -āy (often forms verbs in the ātmanepada, meaning 'to act as' or 'to cause to be')

Root: vistāra (noun)