Source : Webster's Revised Unabridged Dictionary (1913)

Hurtful \Hurt"ful\, a.
   Tending to impair or damage; injurious; mischievous;
   occasioning loss or injury; as, hurtful words or conduct.

   Syn: Pernicious; harmful; baneful; prejudicial; detrimental;
        disadvantageous; mischievous; injurious; noxious;
        unwholesome; destructive. -- {Hurt"ful*ly}, adv. --
        {Hurt"ful*ness}, n.

Source : WordNet®

hurtful
     adj 1: causing hurt; "her hurtful unconsidered words"
     2: harmful to living things; "deleterious chemical additives"
        [syn: {deleterious}, {injurious}]