Part of speech: Noun
a flat plate that controls or directs the flow of fluid or energy
Part of speech: Verb
restrain the emission of (sound, fluid, etc.)
Part of speech: Verb
hinder or prevent (the efforts, plans, or desires) of
Example: What ultimately frustrated every challenger was Ruth's amazing September surge; foil your opponent
Part of speech: Verb
be a mystery or bewildering to
Example: This beats me!; Got me--I don't know the answer!; a vexing problem; This question really stuck me