योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-85, verse-20

आपगा हि पयोमात्रं सङ्गे अर्णव एव सा ।
यदा तदा तमेवाशु प्राप्य तत्रैव लीयते ॥ २० ॥

āpagā hi payomātraṃ saṅge arṇava eva sā ,
yadā tadā tamevāśu prāpya tatraiva līyate 20

20. āpagā hi payomātram saṅge arṇavaḥ eva sā yadā
tadā tam eva āśu prāpya tatra eva līyate

20. āpagā hi saṅge payomātram arṇavaḥ eva sā yadā
tadā tam eva āśu prāpya tatra eva līyate

20. Indeed, when a river (āpagā) merges (saṅge) with the ocean, it is merely water; it becomes the ocean itself. When that happens, having swiftly reached it (the ocean), it dissolves right there.

Words meanings summery:

• आपगा (āpagā) - a flowing river (river)

• हि (hi) - indeed, emphasizing the previous statement (indeed, for, because)

• पयोमात्रम् (payomātram) - nothing but water (merely water, only water)

• सङ्गे (saṅge) - at the point of merging or coming together (in the union, in the confluence, in the contact)

• अर्णवः (arṇavaḥ) - the ocean itself (ocean, sea)

• एव (eva) - indeed, it itself (emphasizing identity) (only, just, indeed, certainly)

• सा (sā) - she (the river) (she, it (feminine))

• यदा (yadā) - at which time, when (when)

• तदा (tadā) - at that time, consequently (then, at that time)

• तम् (tam) - that (ocean) (him, that (masculine accusative))

• एव (eva) - emphasizes 'that very' (ocean) (only, just, indeed)

• आशु (āśu) - quickly, without delay (quickly, swiftly, immediately)

• प्राप्य (prāpya) - having reached (the ocean) (having reached, having obtained, having attained)

• तत्र (tatra) - in that very place (the ocean) (there, in that place)

• एव (eva) - emphasizes 'right there' (only, just, indeed)

• लीयते (līyate) - completely dissolves and merges (dissolves, merges, adheres, disappears)

Words meanings and morphology

आपगा (āpagā) - a flowing river (river)

(noun)

Nominative, feminine, singular of āpagā

āpagā - river

From ā- + pa + gā (goer to water)

Prefix: ā

Root: gam (class 1)

हि (hi) - indeed, emphasizing the previous statement (indeed, for, because)

(indeclinable)

Note: An emphatic particle.

पयोमात्रम् (payomātram) - nothing but water (merely water, only water)

(noun)

Nominative, neuter, singular of payomātra

payomātra - mere water, only water

From payas + mātra

Compound type : tatpuruṣa (payas+mātra)

• payas – water, milk, fluid
  noun (neuter)
• mātra – only, merely, size, measure
  adjective (neuter)

Note: Adjective used as a noun, meaning 'that which is only water'.

सङ्गे (saṅge) - at the point of merging or coming together (in the union, in the confluence, in the contact)

(noun)

Locative, masculine, singular of saṅga

saṅga - union, association, contact, confluence, attachment

From sam- + gam

Prefix: sam

Root: gam (class 1)

अर्णवः (arṇavaḥ) - the ocean itself (ocean, sea)

(noun)

Nominative, masculine, singular of arṇava

arṇava - ocean, sea

Note: Nom. singular masculine, becoming 'arṇava' before 'eva' due to sandhi (Visarga Lopa).

एव (eva) - indeed, it itself (emphasizing identity) (only, just, indeed, certainly)

(indeclinable)

Note: An emphatic particle.

सा (sā) - she (the river) (she, it (feminine))

(pronoun)

Nominative, feminine, singular of tad

tad - that, she, it

Note: Refers to āpagā (river).

यदा (yadā) - at which time, when (when)

(indeclinable)

Note: Correlative adverb.

तदा (tadā) - at that time, consequently (then, at that time)

(indeclinable)

Note: Correlative adverb to yadā.

तम् (tam) - that (ocean) (him, that (masculine accusative))

(pronoun)

Accusative, masculine, singular of tad

tad - that, him, it

Note: Refers to arṇava (ocean).

एव (eva) - emphasizes 'that very' (ocean) (only, just, indeed)

(indeclinable)

Note: An emphatic particle.

आशु (āśu) - quickly, without delay (quickly, swiftly, immediately)

(indeclinable)

Note: Used as an adverb here.

प्राप्य (prāpya) - having reached (the ocean) (having reached, having obtained, having attained)

(indeclinable)

absolutive/gerund

Absolutive form from root āp with prefix pra

Prefix: pra

Root: āp (class 5)

Note: Indeclinable past participle (absolutive/gerund).

तत्र (tatra) - in that very place (the ocean) (there, in that place)

(indeclinable)

Derived from tad + traL suffix

Note: Locative adverb.

एव (eva) - emphasizes 'right there' (only, just, indeed)

(indeclinable)

Note: An emphatic particle.

लीयते (līyate) - completely dissolves and merges (dissolves, merges, adheres, disappears)

(verb)

3rd person , singular, passive, present (laṭ) of lī

present passive

Present passive 3rd singular from root lī

Root: lī (class 4)

Note: Often translated as 'to become absorbed' or 'to disappear'.