Complex sentence: The term diathesis derives from the Greek term (διάθεσις) for disposition, or vulnerability, and it can take the form of genetic, psychological, biological, or situational factors.
Split into simpler sentences: The term diathesis derives from the Greek term (διάθεσις) for a predisposition, or vulnerability. A diathesis can take the form of genetic, psychological, biological, or situational factors.