foiler

One who thwarts

A foiler is someone or something that foils—that is, frustrates or thwarts a plan or effort: The detective proved to be the foiler of every scheme.

In sailing and water sports, a foiler is a boat or board equipped with hydrofoils that lift the hull above the water at speed, reducing drag: The America's Cup foilers can reach fifty knots.

sabotage

spoiler

Premature ending disclosure

disruptor · underminer · wrecker · defeater · hinderer · interceptor · neutralizer · counteractor · impediment · obstacle

hydrofoil

hydrofoil

Wing that lifts boats

wing · lift · hull · speed · watercraft · yacht · regatta · America's Cup · dinghy · moth

fencing

foilist

Fencer using lightest weapon

  • épéeFencing sword, points only
  • sabreCurved single-edged sword
  • parryDefensive blade deflection

riposte · lunge · bout · piste · touché · feint · thrust · fleche · disengage · bladework

Opposites
enabling vs. thwarting

foilerenabler

One who facilitates harmful behavior

facilitator · helper · abettor · supporter · promoter

support vs. obstruction

foilerally

Supportive partner

backer · assistant · champion · advocate · partner

Phrases
Family

foil, foiled, foils, foiling, tinfoil, aluminum foil, counterfoil, unfoiled

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Profile
Used worldwide · Timeless · Concrete · Rated G