diagnose
C1Formal/Technical (Medical, IT, Engineering, Psychology), but also common in everyday contexts when discussing problems.
Definition
Meaning
To identify the nature of an illness or problem through examination and analysis.
To recognise or determine the cause or nature of any situation, malfunction, or issue, based on observed evidence. Often implies a systematic, expert-based assessment.
Linguistics
Semantic Notes
Primarily a verb. The process of diagnosis implies moving from symptoms to underlying cause. Often used with diseases, but extended to systems, faults, and abstract problems.
Dialectal Variation
British vs American Usage
Differences
Spelling of related nouns: BrE 'diagnosis', AmE also 'diagnosis'. No significant difference in verb usage. Collocations and valency patterns are identical.
Connotations
Equally technical/connotative in both dialects.
Frequency
Comparatively high frequency in both, given its technical and general applications.
Vocabulary
Collocations
Grammar
Valency Patterns
[SVO]: The doctor diagnosed pneumonia.[SVOO]: They diagnosed her with anxiety.[SVOA] (Passive): He was diagnosed as autistic.[SVO (as noun phrase)]: Engineers diagnosed a software conflict.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “A swift diagnosis”
- “To diagnose on the spot”
Usage
Context Usage
Business
'We need to diagnose the reason for the drop in sales before the quarterly meeting.'
Academic
'The study aimed to diagnose the underlying cognitive factors contributing to the learning deficit.'
Everyday
'The mechanic diagnosed the strange noise as a loose fan belt.'
Technical
'The system admin used a toolkit to diagnose the network latency issue.'
Examples
By Part of Speech
verb
British English
- The GP was able to diagnose the rare condition.
- They cannot diagnose you over the telephone.
- The car was diagnosed with an electrical fault.
American English
- The pediatrician diagnosed an ear infection.
- She was diagnosed with Lyme disease last fall.
- Our IT team diagnosed the server crash.
Examples
By CEFR Level
- The doctor can diagnose your illness.
- They diagnosed a simple cold.
- It took several tests to diagnose the problem with my laptop.
- He was diagnosed with asthma as a child.
- Specialists struggled to diagnose the complex neurological disorder.
- A failure to diagnose the issue promptly led to a major system outage.
- The consultant's role is to diagnose organisational inefficiencies and propose targeted solutions.
- Researchers are developing AI tools that can diagnose certain cancers from medical scans with high accuracy.
Learning
Memory Aids
Mnemonic
Think: DIAgnose = DIAgram + KNOWS. A doctor looks at a diagram (test results) and KNOWS what's wrong.
Conceptual Metaphor
PROBLEMS ARE DISEASES / SYSTEMS ARE BODIES. (e.g., 'diagnose the fault in the engine').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- False friend with 'диагноз' (the noun). Remember the verb is 'diagnose' /daɪəɡˈnəʊz/, not 'diagnosis'.
- In Russian, you 'make a diagnosis' ('ставить диагноз'); in English, you 'diagnose' a condition or 'diagnose someone *with*' a condition.
Common Mistakes
- Incorrect: 'They diagnosed me diabetes.' Correct: 'They diagnosed me *with* diabetes.' or 'They diagnosed diabetes.'
- Incorrect pronunciation: /daɪəɡˈnəʊsɪs/ (using the noun form for the verb).
Practice
Quiz
Which preposition is commonly used with 'diagnose' when stating what condition a person has?
FAQ
Frequently Asked Questions
The noun is 'diagnosis' (plural: diagnoses). The process is called 'diagnostics'.
Yes, it is commonly extended to any situation where the root cause of a problem is identified through analysis, e.g., diagnosing a car fault, a software bug, or a business problem.
Yes, the two common patterns are: 'diagnose [disease]' and 'diagnose [someone] with [disease]'.
'Diagnose' refers to identifying the current problem or disease. 'Prognose' (much rarer as a verb; the common noun is 'prognosis') refers to predicting the likely course and outcome of that problem or disease.