"foiling" in the noun sense
1. frustration, thwarting, foiling
an act of hindering someone's plans or efforts
"foiling" in the verb sense
1. foil
enhance by contrast
"In this picture, the figures are foiled against the background"
2. thwart, queer, spoil, scotch, foil, cross, frustrate, baffle, bilk
hinder or prevent (the efforts, plans, or desires) of
"What ultimately frustrated every challenger was Ruth's amazing September surge"
"foil your opponent"
3. foil
cover or back with foil
"foil mirrors"
Source: WordNet® (An amazing lexical database of English)
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