BG13.9 Janma-mṛityu-jarā-vyādhi-duḥkha-doṣānudarśanam”

It looks like you’re referencing part of a well-known phrase from Indian philosophy, particularly from Hinduism and Buddhism:

“Janma-mṛityu-jarā-vyādhi-duḥkha-doṣānudarśanam”

(Bhagavad Gita 13.9)

This Sanskrit phrase refers to the inevitable sufferings of life:

1. Janma – Birth
2. Mṛityu – Death
3. Jarā – Old age
4. Vyādhi – Disease

So to answer your question:

The 4th is 

Vyādhi

, which means 

disease

 or 

illness

.

These four—birth, death, old age, and disease—are known as the four inevitable miseries (or “duḥkhas”) of material existence. They are foundational to many spiritual teachings that emphasize liberation (moksha or nirvana) as freedom from this cycle of suffering, known as samsāra.

Let me know if you want a deeper explanation from Hindu, Buddhist, or philosophical perspectives.

A