confirm
US /kənˈfɝːm/
UK /kənˈfɝːm/
1.
establish the truth or correctness of (something previously believed, suspected, or reported)
:
•
Please confirm your attendance by Friday.
•
The new evidence confirmed his innocence.
2.
make (something) stronger or more definite
:
•
The agreement was confirmed by a handshake.
•
His promotion confirmed his status as a rising star.