diagnose

[dahy-uhg-nohs, -nohz, dahy-uhg-nohs, -nohz]
verb (used with object), diagnosed, diagnosing.
1.
to determine the identity of (a disease, illness, etc.) by a medical examination: The doctor diagnosed the illness as influenza.
2.
to ascertain the cause or nature of (a disorder, malfunction, problem, etc.) from the symptoms: The mechanic diagnosed the trouble that caused the engine knock.
3.
to classify or determine on the basis of scientific examination.
verb (used without object), diagnosed, diagnosing.
4.
to make a diagnosis.

Origin:
1860–65; back formation from diagnosis

diagnosable, adjective
underdiagnose, verb (used with object), underdiagnosed, underdiagnosing.
undiagnosable, adjective
undiagnosed, adjective
well-diagnosed, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
diagnose (ˈdaɪəɡˌnəʊz)
 
vb
1.  to determine or distinguish by diagnosis
2.  (tr) to examine (a person or thing), as for a disease
 
diag'nosable
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

diagnose
1861, back formation from diagnosis. Related: Diagnosed.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

diagnose di·ag·nose (dī'əg-nōs', -nōz')
v. di·ag·nosed, di·ag·nos·ing, di·ag·nos·es
To make a diagnosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The number of people diagnosed with lupus has more than tripled over the past
  four decades.
Dysthymia, a disorder related to depression, seems to be diagnosed increasingly
  often.
Usually, it is only when their knees become painful that people go to see a
  doctor and osteoarthritis is diagnosed.
Not everyone who does things criminal is going to be diagnosed as a psychopath.
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