Lack of emotion or motivation; lack of interest or enthusiasm towards something; disinterest (in something).
the condition of being susceptible; vulnerability
Being vulnerable to a treatment (usually an antibiotic or antifungal); also, the degree of such vulnerability (i.e., weak, moderate, or strong).
emotional sensitivity.
electric susceptibility, a measure of how easily a dielectric polarizes in response to an external electric field (compare permittivity).