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

1.
diagnostiquer
identify the nature of (an illness or other problem) by examination of the symptoms
:
•
The doctor was able to diagnose her illness quickly.
Le médecin a pu diagnostiquer sa maladie rapidement.
•
It's important to diagnose the problem early to prevent further damage.
Il est important de diagnostiquer le problème tôt pour éviter d'autres dommages.