antipathy -
Natural contrariety; incompatibility; repugnancy of qualities; as, oil and water have antipathy.
Wikipedia
Antipathy is dislike for something or somebody, the opposite of sympathy. While antipathy may be induced by previous experience, it sometimes exists without a rational cause-and-effect explanation being present to the individuals involved. Thus, the origin of antipathy has been subject to various psychological explanations, which some people find convincing and others regard as highly speculative.
OmegaWiki Dictionary
Ω
antipathy Natural and unrational aversion for someone or something.