Source : WordNet®

undeveloped
     adj 1: not developed; "courses in interior design were rare and
            undeveloped"; "undeveloped social awareness" [ant: {developed}]
     2: undeveloped or unused; "vast unexploited (or undeveloped)
        natural resources" [syn: {unexploited}] [ant: {exploited}]
     3: (of real estate) not built upon or ready for building upon;
        "taxes on undeveloped lots are low"