D defs.my
Entry 1 sense Webster, 1913

For-

· IPA /fɔː(ɹ)/
01 A prefix to verbs, having usually the force of a negative or privative. It often implies also loss, detriment, or destruction, and sometime…
  1. 1.
    A prefix to verbs, having usually the force of a negative or privative. It often implies also loss, detriment, or destruction, and sometimes it is intensive, meaning utterly, quite thoroughly, as in forbathe.