The Collaborative International Dictionary of English v.0.48:

Disquietal \Dis*qui"et*al\, n.
   The act of disquieting; a state of disquiet. [Obs.]
   [1913 Webster]

         [It] roars and strives 'gainst its disquietal. --Dr. H.
                                                  More.
   [1913 Webster]