Source : Webster's Revised Unabridged Dictionary (1913)

Ingrain \In"grain`\, v. t. [imp. & p. p. {Ingrained}; p. pr. &
   vb. n. {Ingraining}.] [Written also engrain.]
   1. To dye with or in grain or kermes.

   2. To dye in the grain, or before manufacture.

   3. To work into the natural texture or into the mental or
      moral constitution of; to stain; to saturate; to imbue; to
      infix deeply.

            Our fields ingrained with blood.      --Daniel.

            Cruelty and jealousy seem to be ingrained in a man
            who has these vices at all.           --Helps.

Source : WordNet®

ingrained
     adj : (used especially of ideas or principles) deeply rooted;
           firmly fixed or held; "deep-rooted prejudice";
           "deep-seated differences of opinion"; "implanted
           convictions"; "ingrained habits of a lifetime"; "a
           deeply planted need" [syn: {deep-rooted}, {deep-seated},
            {implanted}, {planted}]