Source : Webster's Revised Unabridged Dictionary (1913)

Distrustful \Dis*trust"ful\, a.
   1. Not confident; diffident; wanting confidence or thrust;
      modest; as, distrustful of ourselves, of one's powers.

            Distrustful sense with modest caution speaks.
                                                  --Pope.

   2. Apt to distrust; suspicious; mistrustful. --Boyle. --
      {Dis*trust"ful*ly}, adv. -- {Dis*trust"ful*ness}, n.

Source : WordNet®

distrustfully
     adv : with distrust; "she looked at him distrustfully" [syn: {mistrustfully}]
           [ant: {trustfully}]