substantiate

 
Pronunciation: /səbˈstanʃɪeɪt/

verb

[with object]
  • provide evidence to support or prove the truth of: they had found nothing to substantiate the allegations

Derivatives

substantiation

Pronunciation: /-ˈeɪʃ(ə)n/
noun

Origin:

mid 17th century: from medieval Latin substantiat- 'given substance', from the verb substantiare