forcefield

/F AO1 R S F IY0 L D/
noun
  1. 1

    A region of space (a vector field) in which a force operates; contains lines of force; a field of force.

  2. 2

    A mathematical description of the potential energy of a system of atoms.

  3. 3

    An invisible barrier used as a protective shield.

Source: https://en.wiktionary.org/wiki/force%20field, https://en.wiktionary.org/wiki/forcefield