确信

确信 [què xìn]

1. ■ firmly believe; be convinced; be sure; be confident; assurance:

确信无疑 firmly believe sth. to be true;

确信能够成功 be confident of success;

确信某人的诚意 be sure of sb.'s sincerity;

我确信他有罪。 I'm convinced of his guilt.