Does bash have a way to un-export a variable without unsetting it?

Question

Is it possible to export a variable in Bash, then later un-export it, without unsetting it entirely? I.e. have it still available to the current shell, but not to sub-processes.

You can always do this, but it's ugly (and I'm curious):

export FOO  #...  _FOO=$FOO unset FOO FOO=$_FOO 

Answers about other shells also accepted.

Answer 1

export -n FOO 

From help export:

Options:

• -f refer to shell functions
• -n remove the export property from each NAME
• -p display a list of all exported variables and functions