The Collaborative International Dictionary of English v.0.48:

Engrain \En*grain"\, v. t. [imp. & p. p. Engrained; p. pr. &
   vb. n. Engraining.] [Pref. en- + grain. Cf. Ingrain.]
   1. To dye in grain, or of a fast color. See Ingrain.
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            Leaves engrained in lusty green.      --Spenser.
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   2. To incorporate with the grain or texture of anything; to
      infuse deeply. See Ingrain.
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            The stain hath become engrained by time. --Sir W.
                                                  Scott.
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   3. To color in imitation of the grain of wood; to grain. See
      Grain, v. t., 1.
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