Focus on the pronunciation of authenticate
English definition of “authenticate”
/ɑːˈθenṱɪ-/ verb [T]
› to prove that something is real, true, or what people say it is: Each of these signatures must be authenticated by a lawyer. Holograms can be used to authenticate documents.
› IT to prove that someone is a particular person: A password is used to authenticate a user. We offer electronic certificates that authenticate the identity of internet traders. authentication /ɔːˌθentɪˈkeɪʃən/
/ɑːˌθenṱɪ-/ noun [U] › We needed to identify a data source that we could use for authentication.