diagnose

verb

Etymology: Etymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *dwísder. Ancient Greek διά (diá) Ancient Greek δια- (dia-) Proto-Indo-European *ǵneh₃- Proto-Indo-European *-sḱéti Proto-Indo-European *ǵn̥h₃sḱétider. Proto-Hellenic *gignṓskō Ancient Greek γῐγνώσκω (gĭgnṓskō) Ancient Greek δῐαγῐγνώσκω (dĭagĭgnṓskō) Proto-Indo-European *-tis Ancient Greek -τις (-tis) Ancient Greek -σῐς (-sĭs) Ancient Greek δῐᾰ́γνωσῐς (dĭắgnōsĭs)der. Latin diagnōsisder. English diagnosisbf. English diagnose Back-formation from diagnosis. Compare also sclerose (verb).

1. To determine which disease is causing a sick person's signs and symptoms; to find the diagnosis.
2. To determine the cause of a problem.

   “But in the early days of the scheme the new machines created some problems for the fitters, who found them over-complex and their faults hard to diagnose after many years' experience of small, simple steam locomotives.”

   “Mechanics use this extremely portable tool to diagnose engine faults, clear fault codes, and export data.”