The phrase "inalienable part" means something that cannot be taken away or separated from something else. It refers to an essential and fundamental aspect or component that is necessary for the whole to function properly. Full definition
Their plans to expel, enslave, and murder Russians in order to colonise the east was an inalienable part of Nazism. (politics.stackexchange.com)
It is essential, therefore, that the education of children with disabilities be an inalienable part of the general educational system (globaleducationmagazine.com)
Writing research papers is an inalienable part of the academic life. (custom-essay.ws)