Longman Dictionary of Contemporary English homepage

incompatible

adjective
     
in‧com‧pat‧i‧ble
1 two people who are incompatible have such different characters, beliefs etc that they cannot have a friendly relationship [≠ compatible]:
I don't know why they ever got married. They're totally incompatible.
2 two things that are incompatible cannot exist or be accepted together
incompatible with
Business interests are incompatible with public office.
Politeness and truth are often mutually incompatible.
3 two things that are incompatible are of different types and so cannot be used together [≠ compatible]
incompatible with
The laser printer is incompatible with the new computer.
incompatible blood groups
incompatibility noun [uncountable]
sexual incompatibility

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