heart

Definition

In the Bible “heart” is normally used figuratively to refer to a person's mind, thoughts, emotions, desires, and will.

Some cultures use the words "stomach" or "liver" to refer to these parts of a person.
Some cultures may use one word for some of these and another word for others.
If a body part does not have this meaning, some languages may need to say "thoughts" or "emotions" instead of usage the figure of speech.
To have a "hard heart" is a common expression that means a person is unwilling to listen to or obey God.