substantiate
/səbˈstænʃiˌeɪt/
verb
substantiates;
substantiated;
substantiating
substantiates;
substantiated;
substantiating
Britannica Dictionary definition of SUBSTANTIATE
[+ object]
formal
:
to prove the truth of (something)
— substantiation
/səbˌstænʃiˈeɪʃən/
noun
[noncount]