fickle
US /ˈfɪk.əl/
UK /ˈfɪk.əl/

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