योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-20, verse-36

यदा यदा परां कोटिमध्यारोहति यौवनम् ।
वल्गन्ति सज्वराः कामास्तदा नाशाय केवलम् ॥ ३६ ॥

yadā yadā parāṃ koṭimadhyārohati yauvanam ,
valganti sajvarāḥ kāmāstadā nāśāya kevalam 36

36. yadā yadā parām koṭim adhyārohati yauvanam
valganti sajvarāḥ kāmāḥ tadā nāśāya kevalam

36. yadā yadā yauvanam parām koṭim adhyārohati,
tadā sajvarāḥ kāmāḥ kevalam nāśāya valganti.

36. Whenever youth attains its highest peak, then passionate desires, as if feverish, become rampant, leading only to ruin.

Words meanings summery:

• यदा (yadā) - when, whenever

• यदा (yadā) - when, whenever

• पराम् (parām) - supreme, highest, utmost

• कोटिम् (koṭim) - peak, limit, extremity, highest point

• अध्यारोहति (adhyārohati) - ascends, climbs, reaches, attains

• यौवनम् (yauvanam) - youth, youthfulness

• वल्गन्ति (valganti) - leap, bound, dance, become rampant, rage

• सज्वराः (sajvarāḥ) - with fever, feverish, passionate, inflamed

• कामाः (kāmāḥ) - desires, passions, lust

• तदा (tadā) - then, at that time

• नाशाय (nāśāya) - for destruction, for ruin

• केवलम् (kevalam) - only, merely, exclusively

Words meanings and morphology

यदा (yadā) - when, whenever

(indeclinable)

यदा (yadā) - when, whenever

(indeclinable)

पराम् (parām) - supreme, highest, utmost

(adjective)

Accusative, feminine, singular of para

para - supreme, highest, utmost, excellent, ultimate

Note: Declined as feminine to agree with 'koṭim'.

कोटिम् (koṭim) - peak, limit, extremity, highest point

(noun)

Accusative, feminine, singular of koṭi

koṭi - peak, tip, extremity, highest point, limit

अध्यारोहति (adhyārohati) - ascends, climbs, reaches, attains

(verb)

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

Present Tense, Parasmaipada

root: ruh, class: 1 (bhvādi), upasarga: adhi + ā

Prefixes: adhi+ā

Root: ruh (class 1)

यौवनम् (yauvanam) - youth, youthfulness

(noun)

Nominative, neuter, singular of yauvana

yauvana - youth, youthfulness

derived from yuvan (young) with suffix -a

वल्गन्ति (valganti) - leap, bound, dance, become rampant, rage

(verb)

3rd person , plural, active, present (laṭ) of valg

Present Tense, Parasmaipada

root: valg, class: 1 (bhvādi)

Root: valg (class 1)

सज्वराः (sajvarāḥ) - with fever, feverish, passionate, inflamed

(adjective)

Nominative, masculine, plural of sajvara

sajvara - with fever, feverish, passionate

sa (with) + jvara (fever)

Compound type : bahuvrihi (sa+jvara)

• sa – with, together with
  indeclinable
• jvara – fever, passion, affliction
  noun (masculine)

Note: Agrees with 'kāmāḥ'.

कामाः (kāmāḥ) - desires, passions, lust

(noun)

Nominative, masculine, plural of kāma

kāma - desire, wish, love, lust

from root kam (to desire)

Root: kam

तदा (tadā) - then, at that time

(indeclinable)

नाशाय (nāśāya) - for destruction, for ruin

(noun)

Dative, masculine, singular of nāśa

nāśa - destruction, ruin, loss, annihilation

from root naś (to perish)

Root: naś

Note: Indicates purpose.

केवलम् (kevalam) - only, merely, exclusively

(indeclinable)

Note: Used here adverbially.