incompatibility

She wants kids, he doesn't? She's married to him, he's married to his work? That's incompatibility right there: the inability of two sides to exist in a harmonious relationship with each other because of their different outlooks and beliefs.

It's not just relationships between people that are characterized by incompatibility, though that's the most common use of the term. Different objects and ideas can be, too. Being tone deaf is incompatible with being a good singer, for example, and if anyone's ever tried to run a Mac program on a PC they know all about the incompatibility of different computer systems.

Primary Meanings of incompatibility

1.
n
the quality of being unable to exist or work in congenial combination
2.
n
(immunology) the degree to which the body's immune system will try to reject foreign material (as transfused blood or transplanted tissue)
Full Definitions of incompatibility
1

n the quality of being unable to exist or work in congenial combination

Antonyms:
compatibility
capability of existing or performing in harmonious or congenial combination
Types:
conflict
an incompatibility of dates or events
incongruity, incongruousness
the quality of disagreeing; being unsuitable and inappropriate
irony
incongruity between what might be expected and what actually occurs
Type of:
characteristic
a distinguishing quality

n the relation between propositions that cannot both be true at the same time

Synonyms:
inconsistency, mutual exclusiveness, repugnance
Type of:
contradictoriness
the relation that exists when opposites cannot coexist
2

n (immunology) the degree to which the body's immune system will try to reject foreign material (as transfused blood or transplanted tissue)

Types:
histoincompatibility
incompatibility in which one person's tissue cannot be transplanted to another person
Rh incompatibility
incompatibility of Rh blood types; a transfusion of Rh-positive blood given to a Rh-negative person (or vice versa) can result in hemolysis and anemia
Type of:
physical condition, physiological condition, physiological state
the condition or state of the body or bodily functions