baffle

noun

a flat plate that controls or directs the flow of fluid or energy

baffle board

verb

to check the emission of sound
“We baffled the machinery.”
regulate
to be a mystery or bewildering to
“The teenager's actions often baffle their parents.”
beat
to hinder or prevent the efforts, plans, or desires of
“I baffled the stalker by erasing my footsteps.”
spoil