योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-120, verse-25

ह्रसतोऽनुदिनं कृष्णपक्षे कृष्णान्तलेखिकाः ।
दृश्यन्ते कृशगात्रस्य वास्तुकावलयोऽम्बुधेः ॥ २५ ॥

hrasato'nudinaṃ kṛṣṇapakṣe kṛṣṇāntalekhikāḥ ,
dṛśyante kṛśagātrasya vāstukāvalayo'mbudheḥ 25

25. hrasataḥ anudinām kṛṣṇapakṣe kṛṣṇāntalekhikāḥ
dṛśyante kṛśagātrasya vāstukāvalayaḥ ambudheḥ

25. kṛṣṇapakṣe anudinām hrasataḥ kṛśagātrasya
kṛṣṇāntalekhikāḥ ambudheḥ vāstukāvalayaḥ dṛśyante

25. Day by day, as it diminishes in the dark fortnight, dark-edged lines are seen on the slender body (of the moon), resembling circular patches of dark `vāstuka` plants (found) by the ocean.

Words meanings summery:

• ह्रसतः (hrasataḥ) - of the diminishing; of the shrinking; of the decreasing

• अनुदिनाम् (anudinām) - day by day; daily

• कृष्णपक्षे (kṛṣṇapakṣe) - in the dark fortnight

• कृष्णान्तलेखिकाः (kṛṣṇāntalekhikāḥ) - the dark markings visible on the moon's surface (dark-ending lines; dark-edged markings)

• दृश्यन्ते (dṛśyante) - are seen; appear

• कृशगात्रस्य (kṛśagātrasya) - of the moon, which appears slender during its waning phase (of the slender-bodied; of the emaciated body)

• वास्तुकावलयः (vāstukāvalayaḥ) - dark, circular spots or patterns resembling vāstuka plants (circles of vāstuka (plants/marks); circular patches of vāstuka)

• अम्बुधेः (ambudheḥ) - referring to vāstuka plants found near or by the ocean, providing a visual comparison for the moon's markings (of the ocean; from the ocean)

Words meanings and morphology

ह्रसतः (hrasataḥ) - of the diminishing; of the shrinking; of the decreasing

(adjective)

Genitive, masculine, singular of hrasat

hrasat - diminishing, shrinking, decreasing

Present Active Participle

Derived from the root hras 'to diminish' (class 1, parasmāipada).

Root: hras (class 1)

Note: Refers to the moon, which is implicitly masculine.

अनुदिनाम् (anudinām) - day by day; daily

(indeclinable)

कृष्णपक्षे (kṛṣṇapakṣe) - in the dark fortnight

(noun)

Locative, masculine, singular of kṛṣṇapakṣa

kṛṣṇapakṣa - dark fortnight (the waning half of the lunar month)

Compound type : tatpuruṣa (kṛṣṇa+pakṣa)

• kṛṣṇa – dark, black
  adjective
• pakṣa – fortnight, side, wing
  noun (masculine)

कृष्णान्तलेखिकाः (kṛṣṇāntalekhikāḥ) - the dark markings visible on the moon's surface (dark-ending lines; dark-edged markings)

(noun)

Nominative, feminine, plural of kṛṣṇāntalekhikā

kṛṣṇāntalekhikā - dark-ending line; dark-edged marking

Compound type : tatpuruṣa (kṛṣṇa+anta+lekhikā)

• kṛṣṇa – dark, black
  adjective
• anta – end, edge, limit
  noun (masculine/neuter)
• lekhikā – line, marking, streak
  noun (feminine)

दृश्यन्ते (dṛśyante) - are seen; appear

(verb)

3rd person , plural, passive, present (laṭ) of dṛś

Root: dṛś (class 1)

कृशगात्रस्य (kṛśagātrasya) - of the moon, which appears slender during its waning phase (of the slender-bodied; of the emaciated body)

(adjective)

Genitive, masculine, singular of kṛśagātra

kṛśagātra - slender-bodied, emaciated

Compound type : bahuvrīhi (kṛśa+gātra)

• kṛśa – slender, thin, weak
  adjective
• gātra – body, limb
  noun (neuter)

Note: Agrees with the implicit moon.

वास्तुकावलयः (vāstukāvalayaḥ) - dark, circular spots or patterns resembling vāstuka plants (circles of vāstuka (plants/marks); circular patches of vāstuka)

(noun)

Nominative, masculine, plural of vāstukāvalaya

vāstukāvalaya - circle or ring of vāstuka (a type of dark leafy plant, Chenopodium album); circular marks

Compound type : tatpuruṣa (vāstukā+avalaya)

• vāstukā – a type of dark leafy plant (Chenopodium album), also used to denote dark spots or marks
  noun (feminine)
• avalaya – circle, ring, enclosure
  noun (masculine)

अम्बुधेः (ambudheḥ) - referring to vāstuka plants found near or by the ocean, providing a visual comparison for the moon's markings (of the ocean; from the ocean)

(noun)

Genitive, masculine, singular of ambudhi

ambudhi - ocean, sea (literally, 'water-receptacle')

Compound type : tatpuruṣa (ambu+dhi)

• ambu – water
  noun (neuter)
• dhi – receptacle, container, holder
  noun (masculine)
  From root dhā 'to place, hold'.
  Root: dhā (class 3)