This is the 355th most frequent Persian word.
بیماری
Illness; disease.
In this sentence, 'بیماری' is used as a noun referring to a medical condition or illness as the reason for action.
به دلیل بیماری، او نتوانست به سفر برود.
Due to illness, he couldn't go on the trip.
In this context, 'بیماری' is used to inquire about the nature of a specific condition, particularly its ability to spread.
پرسیدم که آیا بیماری او مسری است؟
I asked if his illness is contagious.
Here, 'بیماری' denotes a specific, prolonged medical condition, highlighting its severity and duration.