irreconcilable

Impossible to reconcile.

A person, especially a member of a group, who will not compromise, adjust, or submit.

One of two or more conflicting ideas or beliefs that cannot be brought into harmony.

Not reconcilable; not admitting of reconciliation; that cannot be harmonized or adjusted; incompatible.

One who refuses reconciliation or compromise; specifically, in politics, one who adheres to an apparently hopeless political program, and refuses to accept concessions from opponents.