to fill (a person) with confusion

confuse

to upset the calmness or confidence of (a person)

shake up; confuse

to cause (a discussion, speech, flow of something etc) to be stopped or be in a state of disorder

upset, disorganize

to make (a person) feel uncomfortable, ashamed etc

cause mental discomfort

to puzzle or confuse (a person)

confuse, mix up

a question or problem that is difficult to understand or answer; a game, toy etc designed to test a person's knowledge, skill or patience; to cause (a person) to become confused, worried (about the solution to a problem)

baffle, confuse

to cause (a person) to lose self-control, power of decision, courage

upset, intimidate