anergy

n. lack of energy; lack of immunity to an antigen

Anergy is a theory in immunobiology that describes a lack of reaction by the body's defence mechanisms to foreign substances, and consists of a direct induction of peripheral lymphocyte tolerance. A state of anergy often indicates that the immune system is unable to mount a normal immune response against a specific antigen, usually a self-antigen.
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Noun
1. reduction or lack of an immune response to a specific antigen
(hypernym) immunological disorder
2. inactivity and lack of energy
(hypernym) inaction, inactivity, inactiveness

noun
(i) being weak, lacking energy; (ii) lack of immunity

n.
عدم توانائي , نف توانائي