changeable

adjective

1. 1

   such that alteration is possible; having a marked tendency to change

   changeable behavior

   changeable moods

2. 2

   capable of or tending to change in form or quality or nature

   a mutable substance

   the mutable ways of fortune

3. 3

   varying in color when seen in different lights or from different angles

   changeable taffeta

   chatoyant (or shot) silk

4. 4

   subject to change

   a changeable climate

   the weather is uncertain