class ActiveSupport::Inflector::Inflections

def clear(scope = :all)

clear :plurals
clear :all

:humans.
options are: :plurals, :singulars, :uncountables,
:all). Give the scope as a symbol of the inflection type, the
Clears the loaded inflections within a given scope (default is 
def clear(scope = :all)
  case scope
    when :all
      @plurals, @singulars, @uncountables, @humans = [], [], Uncountables.new, []
    else
      instance_variable_set "@#{scope}", []
  end
end