An antipathy, as toward a person or activity.
A disorder of the immune system causing adverse reactions to substances (allergens) not harmful to most and marked by the body's production of histamines and associated with atopy, anaphylaxis, and asthma.
Altered susceptibility to a first treatment as exhibited in reaction to a subsequent one.
Any condition of hypersensitivity to a substance.
A strong feeling of displeasure, hostility or antagonism towards someone or something, usually combined with an urge to harm, often stemming from perceived provocation, hurt, or threat.
To become angry.
To cause such a feeling of antagonism in.