deep-rooted

from WordNet (r) 3.0 (2006)

deep-rooted
    adj 1: (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},
           {ingrained}, {planted}]

from The Collaborative International Dictionary of English v.0.48

deep-rooted \deep-rooted\ adj.
   well-established; as, deep-rooted prejudice.

   Syn: deep-seated, fundamental, ingrained.
        [WordNet 1.5]