certify
verb uk/ˈsɜː.tɪ.faɪ/ us/ˈsɝː.t̬ə.faɪ/
[ I or T ]（通常以书面形式）证明，证实
to say in a formal or official way, usually in writing, that something is true or correct
[ + (that) ] I hereby certify (that) the above information is true and accurate. 兹证明上述情况属实准确无误。
[ + noun/adj ] The driver was certified (as) dead on arrival at the hospital. 刚送到医院，司机就被证实已经死亡。
The meat has been certified (as) fit for human consumption. 已证实该肉品适合人食用。
[ T ]正式证明…患有精神病
to say officially that someone is mentally ill
As a young man, he had been certified and sent to a hospital for the mentally ill. 他年轻时被证明患有精神病，并被送到了精神病院。