anergia

/AE1 N ER0 JH IY0 AH0/
noun
  1. 1

    Dilute or disorganized energy, which cannot be transformed into work.

  2. 2

    Deficiency of energy.

  3. 3

    Lack of immunity to an antigen.

Source: https://en.wiktionary.org/wiki/anergia, https://en.wiktionary.org/wiki/anergy