The Collaborative International Dictionary of English v.0.48:

Inbred \In"bred`\, a.
   Bred within; innate; as, inbred worth. "Inbred sentiments."
   --Burke.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Inbreed \In*breed"\, v. t. [imp. & p. p. Inbred; p. pr. & vb.
   n. Inbreeding.] [Cf. Imbreed.]
   [1913 Webster]
   1. To produce or generate within. --Bp. Reynolds.
      [1913 Webster]

            To inbreed and cherish . . . the seeds of virtue.
                                                  --Milton.
      [1913 Webster]

   2. To breed in and in. See under Breed, v. i.
      [1913 Webster]

WordNet (r) 3.0 (2006):

inbred
    adj 1: produced by inbreeding [ant: outbred]
    2: normally existing at birth; "mankind's connatural sense of
       the good" [syn: connatural, inborn, inbred]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "inbred":
   atavistic, bodily, born, coeval, congenital, connatal, connate,
   connatural, constitutional, crossbred, endogamic, endogamous,
   exogamic, exogamous, genetic, hereditary, impregnated,
   in the blood, inborn, incarnate, indigenous, inherited, innate,
   inseminated, instinctive, instinctual, linebred, native, native to,
   natural, natural to, organic, outbred, physical, primal,
   temperamental