diagnose
US /ˌdaɪ.əɡˈnoʊs/
UK /ˌdaɪ.əɡˈnoʊs/

1.
diagnostizieren
identify the nature of (an illness or other problem) by examination of the symptoms
:
•
The doctor was able to diagnose her illness quickly.
Der Arzt konnte ihre Krankheit schnell diagnostizieren.
•
It's important to diagnose the problem early to prevent further damage.
Es ist wichtig, das Problem frühzeitig zu diagnostizieren, um weitere Schäden zu vermeiden.