Baffle

Baffle-vt
1-to prove too difficult or complicated for somebody to understand, solve, or deal with, and cause a feeling of confusion or helplessness
2-to hinder or thwart an action or intention (formal)
3-to impede or control the movement of a fluid or gas or the emission of sound or light waves

n
1-a device used to control or impede the flow or emission of something and reduce its force
2-a partition in a loudspeaker or microphone intended to prevent sound waves of different frequencies from interfering with one another

Synonyms
confuse
perplex
puzzle
flummox
stump
nonplus
mystify
confound
bewilder
bemuse
befuddle