reluctance

noun4

1. •
   Unwillingness to do something.

   • Our new dog shows reluctance to go on walks, preferring to be indoors.
2. •
   Hesitancy in taking some action.
3. •
   That property of a magnetic circuit analogous to resistance in an electric circuit.

   • That is to say, the total number of ampere-hours, including the drop of gilbertage, due to magnetic flux traversing the reluctance of the circuit, must be equal to zero. — 1903
4. •
   (no longer used) Defiance, disobedience.