nestalan

1. (of weather, mood, prices) changeable; unsettled
   Ovog proleća vreme je baš nestalno. — The weather has been really changeable this spring.
   Ima nestalno raspoloženje, nikad ne znaš šta da očekuješ. — Her mood is unpredictable, you never know what to expect.
2. (of a person) fickle; inconstant
   On je nestalan i ne može dugo da bude ni sa kim. — He's fickle and can't stay with anyone for long.
3. (of work, income) irregular; unstable
   Radi honorarno i ima nestalne prihode. — He works freelance and has an irregular income.