ev·i·den·tial
adjective/ˌevɪˈdenʃl/
/ˌevɪˈdenʃl/
[usually before noun] (formal)- providing or connected with evidence
提供证据的；作证的 - The necessary evidential basis for her claim is lacking.
她的诉求缺乏必要的基本凭据。
- The necessary evidential basis for her claim is lacking.