fickle
US /ˈfɪk.əl/
UK /ˈfɪk.əl/

1.
tidak menentu, berubah-ubah
changing frequently, especially as regards one's loyalties, interests, or affection
:
•
The weather here is notoriously fickle.
Cuaca di sini terkenal tidak menentu.
•
She's very fickle, one day she loves you, the next she hates you.
Dia sangat tidak tetap hati, satu hari dia sayang awak, hari berikutnya dia benci awak.