changeful adj : such that alteration is possible; having a marked tendency to change; "changeable behavior"; "changeable moods"; "changeable prices" [syn: changeable] [ant: unchangeable]

English

Adjective

1. In the context of "rare": Changing frequently; very susceptible to change; variable; fickle.
   • 1606, William Shakespeare, Troilus and Cressida, act IV sc iv ln 99.

     When we will tempt the frailty of our powers, presuming on their changeful potency.

References

• Dictionary.com
• Webster 1913