原因英语怎么说

"Cause" is the English word for the Chinese word "原因". It can refer to the reason for something happening or existing, or the source of a problem or difficulty.

Examples:

What is the cause of this illness?
Poverty is the main cause of crime in this city.
The cause of the fire is still unknown.

The word "cause" comes from the Latin word "causa", which means "reason" or "ground". It is a noun and is commonly used in English to refer to the reason or justification for something happening or existing.