1. Disappointingly unsuccessful
   "their foiled attempt to capture Calais"
   - defeated, disappointed, discomfited, frustrated, thwarted

1. Enhance by contrast
   "In this picture, the figures are foiled against the background" 
2. Hinder or prevent (the efforts, plans, or desires) of
   "foil your opponent"
   - thwart, queer, spoil, scotch, cross, frustrate, baffle, bilk 
3. Cover or back with foil
   "foil mirrors"

See also: foiling, unsuccessful

Type of: contrast, counterpoint, cover, forbid, foreclose, forestall, preclude, prevent

Encyclopedia: Foil Foil, Missouri

• Watts
• Watusi
• Watutsi
• Waugh
• waul
• Wausau
• wave
• wave angle
• wave equation
• wave mechanics
• wave number
• wave shape
• wave theory
• wave theory of light
• wave train
• substantive dye
• substantively
• substantivise
• substantivize
• substation
• substituent
• substitutability
• substitutable
• substitute
• substitute teacher