not necessarily
US /nɑːt ˈnes.ə.ser.ɪ.li/
UK /nɑːt ˈnes.ə.ser.ɪ.li/

1.
belum tentu, tidak harus
used to say that something is not always true or not true in every situation
:
•
Being rich does not necessarily make you happy.
Menjadi kaya belum tentu membuatmu bahagia.
•
Just because he's quiet, it does not necessarily mean he's shy.
Hanya karena dia pendiam, belum tentu dia pemalu.