योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-13, verse-79

अप्यापत्सु दुरन्तासु कल्पान्तेषु महत्स्वपि ।
तुच्छेऽहं न मनो यस्य स शान्त इति कथ्यते ॥ ७९ ॥

apyāpatsu durantāsu kalpānteṣu mahatsvapi ,
tucche'haṃ na mano yasya sa śānta iti kathyate 79

79. api āpatsu durantāsu kalpānteṣu mahatsu api tucche
aham na manaḥ yasya saḥ śāntaḥ iti kathyate

79. yasya manaḥ durantāsu āpatsu mahatsu api kalpānteṣu api tucche aham na (asti),
saḥ śāntaḥ iti kathyate

79. Even amidst dreadful, unending calamities and during the great dissolutions of cosmic cycles (kalpa), he whose mind (manas) does not identify with the trivial ego (ahaṅkāra) is called peaceful.

Words meanings summery:

• अपि (api) - even (also, even, indeed)

• आपत्सु (āpatsu) - in dreadful situations (in calamities, in misfortunes)

• दुरन्तासु (durantāsu) - in terrible, unending (in which there is a bad end, unending, terrible)

• कल्पान्तेषु (kalpānteṣu) - during the dissolutions of cosmic cycles (kalpa) (in the ends of kalpas, in the times of dissolution)

• महत्सु (mahatsu) - in great (calamities or kalpas) (in great ones, in great matters)

• अपि (api) - even (also, even, indeed)

• तुच्छे (tucche) - in trivial matters (in the trivial, in the insignificant)

• अहम् (aham) - the ego (ahaṅkāra) (I, ego, self-sense)

• न (na) - not (not, no)

• मनः (manaḥ) - mind (manas) (mind, intellect, heart)

• यस्य (yasya) - whose (whose, of whom)

• सः (saḥ) - he (he, that)

• शान्तः (śāntaḥ) - peaceful (peaceful, tranquil, calm, quieted)

• इति (iti) - thus (thus, in this way, so)

• कथ्यते (kathyate) - is called (is said, is told, is called)

Words meanings and morphology

अपि (api) - even (also, even, indeed)

(indeclinable)

आपत्सु (āpatsu) - in dreadful situations (in calamities, in misfortunes)

(noun)

Locative, feminine, plural of āpad

āpad - calamity, misfortune, adversity, distress

दुरन्तासु (durantāsu) - in terrible, unending (in which there is a bad end, unending, terrible)

(adjective)

Locative, feminine, plural of duranta

duranta - having a bad end, terrible, endless, difficult to end

Compound type : bahuvrihi (dur+anta)

• dur – bad, difficult
  indeclinable
• anta – end, limit, boundary
  noun (masculine)

Note: Agrees with āpatsu

कल्पान्तेषु (kalpānteṣu) - during the dissolutions of cosmic cycles (kalpa) (in the ends of kalpas, in the times of dissolution)

(noun)

Locative, masculine, plural of kalpānta

kalpānta - end of a kalpa, cosmic dissolution

Compound type : tatpuruṣa (kalpa+anta)

• kalpa – a cosmic cycle, aeon, one day of Brahmā
  noun (masculine)
• anta – end, limit, boundary
  noun (masculine)

महत्सु (mahatsu) - in great (calamities or kalpas) (in great ones, in great matters)

(adjective)

Locative, plural of mahat

mahat - great, large, vast, important

Note: Agrees with kalpānteṣu (or āpatsu) implicitly, referring to the greatness of these events.

अपि (api) - even (also, even, indeed)

(indeclinable)

तुच्छे (tucche) - in trivial matters (in the trivial, in the insignificant)

(adjective)

Locative, neuter, singular of tuccha

tuccha - trivial, insignificant, empty, vain

Note: Agrees with an implied noun like 'vastuni' (matter) or 'kārye' (action), or refers to the trivial nature of the 'aham'.

अहम् (aham) - the ego (ahaṅkāra) (I, ego, self-sense)

(pronoun)

Nominative, singular of aham

aham - I, self, ego

न (na) - not (not, no)

(indeclinable)

मनः (manaḥ) - mind (manas) (mind, intellect, heart)

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, heart, faculty of thought and feeling

यस्य (yasya) - whose (whose, of whom)

(pronoun)

Genitive, singular of yad

yad - which, what, who

सः (saḥ) - he (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

शान्तः (śāntaḥ) - peaceful (peaceful, tranquil, calm, quieted)

(adjective)

Nominative, masculine, singular of śānta

śānta - peaceful, tranquil, calm, quieted, appeased

Past Passive Participle

Derived from root śam (to be calm, to cease) with suffix -ta.

Root: śam (class 4)

Note: Agrees with saḥ.

इति (iti) - thus (thus, in this way, so)

(indeclinable)

कथ्यते (kathyate) - is called (is said, is told, is called)

(verb)

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

Denominative from katha (story/speech) or causative of kṛt, or root kath.

Root: kath (class 10)