Source : WordNet®

unwanted
     adj 1: not wanted; not needed; "tried to give away unwanted
            kittens" [ant: {wanted}]
     2: without being invited; "an unwanted intrusion"; "uninvited
        guests" [syn: {unasked}, {uninvited}]
     3: interfering; "unwanted shadows distort the picture";
        "removed the unwanted vegetation"