to bewilder or perplex (somebody)

archaic to embarrass or abash (somebody)

to muddle or befuddle (a person or their mind, etc)

He had not drunk enough wine to confuse his wits

to make (something) more incomprehensible

Don't try to explain; you'll just confuse the issue

(often + with) to muddle (two or more usu similar things) or mistake (one thing) for another

I often confuse the twins

People confuse ‘mitigate’ with ‘militate’