incompatible
C1Formal and semi-formal; common in technical, academic, business, and relationship contexts.
Definition
Meaning
Not able to exist, work, or be used together without conflict or problems.
Characterized by a fundamental difference in nature, principles, or purpose that prevents combination or harmony; incapable of association in thought or character.
Linguistics
Semantic Notes
Describes an inherent, fundamental mismatch rather than a temporary or minor disagreement. Often implies a logical or systemic contradiction.
Dialectal Variation
British vs American Usage
Differences
No significant difference in core usage. The adverb 'incompatibly' is extremely rare in both varieties.
Connotations
Equally strong connotations of impossibility of combination in both varieties.
Frequency
Slightly higher frequency in American English in technical/IT contexts (e.g., software/hardware compatibility).
Vocabulary
Collocations
Grammar
Valency Patterns
[be] incompatible with [noun phrase][noun phrase] and [noun phrase] are incompatibleVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Oil and water are incompatible. (Common metaphor)”
Usage
Context Usage
Business
Refers to software systems, corporate cultures, or strategic goals that cannot work together: 'The merger failed due to incompatible management philosophies.'
Academic
Used in logic, philosophy, science: 'The two hypotheses are mutually incompatible.'
Everyday
Commonly describes relationships, lifestyles, or beliefs: 'Their schedules are incompatible for a regular meet-up.'
Technical
Crucial in IT, engineering, medicine: 'The new driver is incompatible with older operating systems.'
Examples
By Part of Speech
verb
British English
- The systems are designed to not incompat. (Note: No standard verb form exists. Use 'be incompatible' or 'conflict with'.)
American English
- (No standard verb form)
adverb
British English
- The two theories co-exist incompatibly. (Very rare)
American English
- (Rarely used)
adjective
British English
- The new software update is incompatible with older hardware.
American English
- Their values turned out to be totally incompatible.
Examples
By CEFR Level
- The app is incompatible with my phone.
- Cats and dogs are sometimes incompatible.
- Their goals for the project were fundamentally incompatible.
- The chemical is incompatible with strong acids.
- The philosopher argued that free will and determinism are logically incompatible.
- The proposed treaty clauses are mutually incompatible, rendering the agreement void.
Learning
Memory Aids
Mnemonic
IN- (not) + COMPATIBLE (able to exist together). Think: 'They are NOT compatible roommates.'
Conceptual Metaphor
COMBINATION IS HARMONY / LACK OF COMBINATION IS CONFLICT (e.g., 'Oil and water don't mix.').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid using 'несовместимый' for temporary personal disagreements; English 'incompatible' is stronger, implying a systemic mismatch.
- Do not confuse with 'неподходящий' (unsuitable). 'Incompatible' is more about inherent contradiction than simple lack of fit.
Common Mistakes
- Using it for mild disagreements (e.g., 'We were incompatible about what film to watch' – use 'couldn't agree').
- Incorrect preposition: 'incompatible to' (correct: 'incompatible with').
Practice
Quiz
In which context is 'incompatible' LEAST appropriately used?
FAQ
Frequently Asked Questions
Yes, commonly to describe a fundamental mismatch in personality, values, lifestyles, or long-term goals, not just occasional arguments.
Always 'with'. Example: 'This action is incompatible with the company's values.'
Yes, 'incompatibility' (countable/uncountable). Example: 'The incompatibility of the systems caused the failure.'
'Incompatible' implies things cannot coexist or work together at all. 'Inconsistent' means not always acting the same way or containing contradictions, but they may still co-exist.
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