Source : Webster's Revised Unabridged Dictionary (1913)

Shameful \Shame"ful\, a.
   1. Bringing shame or disgrace; injurious to reputation;
      disgraceful.

            His naval preparations were not more surprising than
            his quick and shameful retreat.       --Arbuthnot.

   2. Exciting the feeling of shame in others; indecent; as, a
      shameful picture; a shameful sight. --Spenser.

   Syn: Disgraceful; reproachful; indecent; unbecoming;
        degrading; scandalous; ignominious; infamous. --
        {Shame"ful*ly}, adv. -- {Shame"ful*ness}, n.

Source : WordNet®

shamefully
     adv : in a dishonorably manner or to a dishonorable degree; "his
           grades were disgracefully low" [syn: {disgracefully}, {ingloriously},
            {ignominiously}, {discreditably}, {dishonorably}, {dishonourably}]