1. hinder or prevent (the efforts, plans, or desires) of;
"What ultimately frustrated every challenger was Ruth's amazing September surge""foil your opponent"
2. put in a dangerous, disadvantageous, or difficult position
Adjective
1. beyond or deviating from the usual or expected;
"a curious hybrid accent""her speech has a funny twang""they have some funny ideas about war""had an odd name""the peculiar aromatic odor of cloves""something definitely queer about this town""what a rum fellow""singular behavior"
2. not as expected;
"there was something fishy about the accident""up to some funny business""some definitely queer goings-on""a shady deal""her motives were suspect""suspicious behavior"