necessary

adjective
A2
OPAL
1
A2
that is needed for a purpose or a reason
ضروری, لازم, واجب, الزامی, حیاتی
synonym essential
2
B2
that must exist or happen and cannot be avoided
ضروری, لازم, واجب
This is a necessary consequence of progress.
A necessary condition for a steep fall in demand is a widespread collapse in confidence.
synonym inevitable