changeable
     adj 1: capable of or tending to change in form or quality or
            nature; "a mutable substance"; "the mutable ways of
            fortune"; "mutable weather patterns"; "a mutable
            foreign policy" [syn: {mutable}] [ant: {immutable}]
     2: such that alteration is possible; having a marked tendency
        to change; "changeable behavior"; "changeable moods";
        "changeable prices" [syn: {changeful}] [ant: {unchangeable}]
     3: subject to change; "a changeable climate"; "the weather is
        uncertain"; "unsettled weather with rain and hail and
        sunshine coming one right after the other" [syn: {uncertain},
         {unsettled}]
     4: varying in color when seen in different lights or from
        different angles; "changeable taffeta"; "chatoyant (or
        shot) silk"; "a dragonfly hovered, vibrating and
        iridescent" [syn: {chatoyant}, {iridescent}, {shot}]
Source: WordNet® 2.0