योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-114, verse-4

लुनात्युपत्यकां वार्धिः शैलशालिशिलावलीः ।
वनालीर्लहरीदात्रैरापादफलपल्लवाः ॥ ४ ॥

lunātyupatyakāṃ vārdhiḥ śailaśāliśilāvalīḥ ,
vanālīrlaharīdātrairāpādaphalapallavāḥ 4

4. lunāti upatyakām vārdhiḥ śaila-śāli-śilāvalīḥ |
vanālīḥ laharī-dātraiḥ ā-pāda-phala-pallavāḥ || 4 ||

4. The ocean cuts the valley, the rows of mountain-like rocks, and the forest groves—from their roots to their fruits and sprouts—with its wave-sickles.

Words meanings summery:

• लुनाति (lunāti) - cuts, mows, reaps, severs

• उपत्यकाम् (upatyakām) - valley, low-lying land at the foot of a mountain

• वार्धिः (vārdhiḥ) - ocean, sea

• शैल-शालि-शिलावलीः (śaila-śāli-śilāvalīḥ) - specific type of rock formations being cut by the ocean (rows of rocks resembling mountains)

• वनालीः (vanālīḥ) - other natural formations being cut (rows of forests, forest groves)

• लहरी-दात्रैः (laharī-dātraiḥ) - the instrument by which the cutting is done (with wave-sickles, with sickles of waves)

• आ-पाद-फल-पल्लवाः (ā-pāda-phala-pallavāḥ) - indicating the complete destruction/cutting down to the basic elements of the plants/trees (from root to fruit and sprout)

Words meanings and morphology

लुनाति (lunāti) - cuts, mows, reaps, severs

(verb)

3rd person , singular, active, present (laṭ) of lū

Present active, 3rd person singular

Root: lū (class 9)

उपत्यकाम् (upatyakām) - valley, low-lying land at the foot of a mountain

(noun)

Accusative, feminine, singular of upatyakā

upatyakā - valley, low-lying land at the foot of a mountain

Note: Object of 'lunāti'.

वार्धिः (vārdhiḥ) - ocean, sea

(noun)

Nominative, masculine, singular of vārdhi

vārdhi - ocean, sea, repository of waters

From 'vāri' (water) + 'dhā' (to hold/contain)

Root: dhā (class 3)

Note: Subject of 'lunāti'.

शैल-शालि-शिलावलीः (śaila-śāli-śilāvalīḥ) - specific type of rock formations being cut by the ocean (rows of rocks resembling mountains)

(noun)

Accusative, feminine, plural of śaila-śāli-śilāvali

śaila-śāli-śilāvali - rows of rocks resembling mountains

Compound type : tatpuruṣa (śaila-śāli+śilāvali)

• śaila-śāli – resembling mountains, mountain-like
  adjective (masculine)
• śilāvali – row of rocks, series of stones
  noun (feminine)

Note: Object of 'lunāti'.

वनालीः (vanālīḥ) - other natural formations being cut (rows of forests, forest groves)

(noun)

Accusative, feminine, plural of vanālī

vanālī - row of forests, forest grove

Compound type : tatpuruṣa (vana+ālī)

• vana – forest, wood
  noun (neuter)
• ālī – row, range, line, series
  noun (feminine)

Note: Object of 'lunāti'.

लहरी-दात्रैः (laharī-dātraiḥ) - the instrument by which the cutting is done (with wave-sickles, with sickles of waves)

(noun)

Instrumental, neuter, plural of laharī-dātra

laharī-dātra - wave-sickle, sickle-like wave

Compound type : rupaka (laharī+dātra)

• laharī – wave, billow
  noun (feminine)
• dātra – sickle, scythe
  noun (neuter)
  Root: dā (class 3)

Note: Instrument of action.

आ-पाद-फल-पल्लवाः (ā-pāda-phala-pallavāḥ) - indicating the complete destruction/cutting down to the basic elements of the plants/trees (from root to fruit and sprout)

(adjective)

Accusative, feminine, plural of ā-pāda-phala-pallava

ā-pāda-phala-pallava - from foot/root to fruit and sprout/leaf

Compound type : dvandva (pāda+phala+pallava)

• pāda – foot, root, base, quarter
  noun (masculine)
• phala – fruit, result, consequence
  noun (neuter)
• pallava – sprout, young leaf, tender shoot
  noun (masculine)

Note: Qualifies 'śaila-śāli-śilāvalīḥ' and 'vanālīḥ'.