Capricious (13)
'capricious' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for fickle that I've seen before include "Inconstant, changeable" , "Often changing, not reliable emotionally" , "Subject to changes of mind" , "Erratic, unpredictable" , "Inconstant in affections" .)
'capricious' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for unpredictable that I've seen before include "Changeable" , "Capricious" , "erratic" .)
'capricious' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for temperamental that I've seen before include "Difficult" , "Touchy, moody" , "Subject to sharply varying moods" , "Erratic" , "requiring delicate handling" .)
'capricious' is the definition.
(I know that capricious can be written as whimsical)
This is all the clue.
(Other definitions for whimsical that I've seen before include "Capricious" , "Mischievous" , "Quaintly fantastic" , "Delicately playful" , "Fanciful, fantastical" .)
'capricious' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for mercurial that I've seen before include "lively" , "Temperamental" , "Volatile" , "Erratic" , "Sprightly" .)