Below are possible answers for the crossword clue Prevent the success of.
4 letter answer(s) to prevent the success of
FOIL
a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through; "the fins of a fish act as hydrofoils"
a light slender flexible sword tipped by a button
a piece of thin and flexible sheet metal; "the photographic film was wrapped in foil"
anything that serves by contrast to call attention to another thing's good qualities; "pretty girls like plain friends as foils"
cover or back with foil; "foil mirrors"
enhance by contrast; "In this picture, the figures are foiled against the background"
Fencing sword
hinder or prevent (the efforts, plans, or desires) of; "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
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