incompatible
adj.adj. describing two things that are so different they cannot exist or work together. You use this when ideas, machines, or people don't match or would cause problems if combined.
adj. unable to exist, work, or be used together due to fundamental differences. Often describes logical propositions that cannot both be true, or substances that react negatively when mixed.
The new software is incompatible with my old computer.
The two political parties found their core values were incompatible, making a coalition government impossible.
In chemistry, mixing incompatible substances can lead to dangerous reactions, while in logic, two incompatible statements cannot simultaneously be accepted as true within the same framework.
Borrowed from French incompatible.
Often followed by the preposition 'with'. Frequently used in technical contexts like computing, medicine, or formal logic.