diagnose

US /ˌdaɪ.əɡˈnoʊs/
UK /ˌdaɪ.əɡˈnoʊs/
"diagnose" picture
1.

identify the nature of (an illness or other problem) by examination of the symptoms

:
The doctor was able to diagnose her illness quickly.
It's important to diagnose the problem early to prevent further damage.