The Collaborative International Dictionary of English v.0.48:

Scruple \Scru"ple\, v. i. [imp. & p. p. Scrupled; p. pr. & vb.
   n. Scrupling.]
   To be reluctant or to hesitate, as regards an action, on
   account of considerations of conscience or expedience.
   [1913 Webster]

         We are often over-precise, scrupling to say or do those
         things which lawfully we may.            --Fuller.
   [1913 Webster]

         Men scruple at the lawfulness of a set form of divine
         worship.                                 --South.
   [1913 Webster]