unbind

The unbind filter removes the value associated with a variable, dictionary, or dictionary entry.

With a variable:

    Foo=1
    unbind Foo
    isunbound Foo //matches
  

With a dictionary:

    dictionary D
    D["check"]="mate"
    D["back"]="rank"
    unbind D["check"]
    unbind D

For more information on unbind with dictionaries, see unbind.