legitimacy

这个文件的合法性需要进一步验证。

The ___legitimacy of this document needs further verification.

法官质疑这份文件的合法性，要求提供更多证据。

The judge questioned the ___legitimacy of the document and asked for more proof.

在古代欧洲，只有合法婚生子女才能继承家族财产。

In ancient Europe, only children with ___legitimacy could inherit family property.