Source : Webster's Revised Unabridged Dictionary (1913)

Stutter \Stut"ter\, v. t. & i. [imp. & p. p. {Stuttered}; p. pr.
   & vb. n. {Stuttering}.] [Freq. of stut, OE. stoten; probably
   of Dutch or Low German origin; cf. D. & LG. stotteren, G.
   stottern, D. stooten to push, to strike; akin to G. stossen,
   Icel. stauta, Sw. st["o]ta, Dan. st["o]de, Goth. stautan, L.
   tundere, Skr. tud to thrust. Cf. {Contuse}, {Obtuse}.]
   To hesitate or stumble in uttering words; to speak with
   spasmodic repetition or pauses; to stammer.

         Trembling, stuttering, calling for his confessor.
                                                  --Macaulay.

Stuttering \Stut"ter*ing\, n.
   The act of one who stutters; -- restricted by some
   physiologists to defective speech due to inability to form
   the proper sounds, the breathing being normal, as
   distinguished from stammering.

Stuttering \Stut"ter*ing\, a.
   Apt to stutter; hesitating; stammering. -- {Stut"ter*ing*ly},
   adv.

Source : WordNet®

stuttering
     adj : unable to speak freely and easily [syn: {stammering(a)}, {stuttering(a)}]