Source : Webster's Revised Unabridged Dictionary (1913)

Fretful \Fret"ful\, a. [See 2d {Fret}.]
   Disposed to fret; ill-humored; peevish; angry; in a state of
   vexation; as, a fretful temper. -- {Fret"ful-ly}, adv. --
   {Fret"ful-ness}, n.

   Syn: Peevish; ill-humored; ill-natured; irritable; waspish;
        captious; petulant; splenetic; spleeny; passionate;
        angry.

   Usage: {Fretful}, {Peevish}, {Cross}. These words all
          indicate an unamiable working and expression of
          temper. Peevish marks more especially the inward
          spirit: a peevish man is always ready to find fault.
          Fretful points rather to the outward act, and marks a
          complaining impatience: sickly children are apt to be
          fretful. Crossness is peevishness mingled with
          vexation or anger.

Source : WordNet®

fretful
     adj 1: unable to relax or be still; "a constant fretful stamping of
            hooves"; "itchy for excitement"; "a restless child"
            [syn: {fidgety}, {itchy}, {restless}]
     2: habitually complaining; "a whining child" [syn: {querulous},
         {whiney}, {whining(a)}, {whiny}]