definition of
[fickle]

[1] #1 fickle s. [volatile] marked by erratic changeableness in affections or attachments; "fickle friends"; "a flirt's volatile affections". wn

[2] #2 fickle s. [erratic, mercurial, quicksilver] liable to sudden unpredictable change; "erratic behavior"; "fickle weather"; "mercurial twists of temperament"; "a quicksilver character, cool and willful at one moment, utterly fragile the next". wn