inevitability

US /ˌɪnˌev.ə.t̬əˈbɪl.ə.t̬i/
UK /ˌɪnˌev.ə.t̬əˈbɪl.ə.t̬i/
1.

the fact of being certain to happen and unable to be avoided or prevented:

:
the inevitability of change