महाभारतः mahābhārataḥ - book-3, chapter-219, verse-51

आविशन्ति च यं यक्षाः पुरुषं कालपर्यये ।
उन्माद्यति स तु क्षिप्रं ज्ञेयो यक्षग्रहस्तु सः ॥५१॥

51. āviśanti ca yaṁ yakṣāḥ puruṣaṁ kālaparyaye ,
unmādyati sa tu kṣipraṁ jñeyo yakṣagrahastu saḥ.

51. āviśanti ca yam yakṣāḥ puruṣam kālaparyaye
unmādyati saḥ tu kṣipram jñeyaḥ yakṣagrahaḥ tu saḥ

51. And when Yakshas enter a man (puruṣa) at the turning of a time, he quickly goes mad. That is to be known as Yaksha possession.

Words meanings summery:

• आविशन्ति (āviśanti) - they enter

• च (ca) - and

• यम् (yam) - whom

• यक्षाः (yakṣāḥ) - Yakshas (class of demigods)

• पुरुषम् (puruṣam) - man, male person

• कालपर्यये (kālaparyaye) - at the change of time/season

• उन्माद्यति (unmādyati) - he goes mad, becomes insane

• सः (saḥ) - he

• तु (tu) - but, indeed, however

• क्षिप्रम् (kṣipram) - quickly, swiftly

• ज्ञेयः (jñeyaḥ) - to be known, knowable

• यक्षग्रहः (yakṣagrahaḥ) - Yaksha possession, seizure by a Yaksha

• तु (tu) - but, indeed, however

• सः (saḥ) - referring to the possession (that, it)

Words meanings and morphology

आविशन्ति (āviśanti) - they enter

(verb)

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

Prefix: ā

Root: viś (class 6)

च (ca) - and

(indeclinable)

यम् (yam) - whom

(pronoun)

Accusative, masculine, singular of yad

yad - who, which, what

यक्षाः (yakṣāḥ) - Yakshas (class of demigods)

(noun)

Nominative, masculine, plural of yakṣa

yakṣa - Yaksha, a class of demigods, often guardians of treasures

पुरुषम् (puruṣam) - man, male person

(noun)

Accusative, masculine, singular of puruṣa

puruṣa - man, male, person, spirit (puruṣa)

कालपर्यये (kālaparyaye) - at the change of time/season

(noun)

Locative, masculine, singular of kālaparyaya

kālaparyaya - change of time, revolution of seasons

Compound type : tatpuruṣa (kāla+paryaya)

• kāla – time, period, season
  noun (masculine)
• paryaya – change, revolution, succession, turn
  noun (masculine)

उन्माद्यति (unmādyati) - he goes mad, becomes insane

(verb)

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

Prefix: ud

Root: mad (class 4)

सः (saḥ) - he

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

तु (tu) - but, indeed, however

(indeclinable)

क्षिप्रम् (kṣipram) - quickly, swiftly

(indeclinable)

Note: Adverbial use of neuter singular accusative.

ज्ञेयः (jñeyaḥ) - to be known, knowable

(adjective)

Nominative, masculine, singular of jñeya

jñeya - knowable, to be known, understandable

Gerundive (Potential Passive Participle)

Root: jñā (class 9)

यक्षग्रहः (yakṣagrahaḥ) - Yaksha possession, seizure by a Yaksha

(noun)

Nominative, masculine, singular of yakṣagraha

yakṣagraha - Yaksha possession, seizure by a Yaksha

Compound type : tatpuruṣa (yakṣa+graha)

• yakṣa – Yaksha, a class of demigods, often guardians of treasures
  noun (masculine)
• graha – seizure, grasping, planet, demon of disease, possession
  noun (masculine)
  Root: grah (class 9)

तु (tu) - but, indeed, however

(indeclinable)

सः (saḥ) - referring to the possession (that, it)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it