untapped

untapped
    adj 1: not subjected to tapping; "an untapped keg"; "an untapped
           sugar maple" [ant: {tapped}]
    2: not drawn upon or used; "untapped reserves of coal"; "the
       untapped stockrooms of our minds"- G.R.Harrison
    

34 Moby Thesaurus words for "untapped":
      extra, fresh, held back, held in reserve, held out, in abeyance,
      in hand, mint, new, original, pristine, put aside, put by, reserve,
      saved, spare, stored, suspended, to spare, unapplied, unbeaten,
      unconsumed, unemployed, unexercised, unexpended, unhandled,
      unspent, unspoiled, untouched, untrodden, unused, unutilized,
      virginal, waived