incompatible

Definitions

So different in nature as to be incapable of coexisting or being used together.

Not able to exist or perform in harmony with another person or thing.

Inconsistent or contradictory, such as two statements or beliefs that cannot both be true.

Examples

The new software update is incompatible with older versions of the operating system.

Their personalities were fundamentally incompatible, leading to constant arguments.

Synonyms

conflicting clashing mismatched incongruous irreconcilable discordant contradictory

Antonyms

compatible harmonious consistent congruent agreeable matching suitable