"foil her" is a correct and usable phrase in written English
It means to prevent someone from achieving their goal or plan. Example: The cunning detective was able to foil her evil plan and save the city from destruction.
"I prefer to foil her plans".
She makes a good foil: her low-key straightforwardness complements Salmond's quick-witted ebullience.
She wants to kill herself as soon as possible, but her relatives foil her plans by locking away the knives and uncovering her hidden accumulation of sleeping pills.
For years, animal lovers like Karen Cotton, a neighbor of the mayor's, have tried to foil her every effort at "thinning" the deer population.
Betty, of course, is Norma's foil: her innocent earnestness springs from a well of purity that has yet to be corrupted.
To create another break point, Henin snapped a backhand cross-court winner off a drop shot by Capriati, then pressured her into three errors to foil her service game.
At Dunder Mifflin's Stamford branch, Karen Filippelli Rashida Joness) discovers that Jim Halpert John Krasinskii) swapped his chair for hers, but Jim foils her efforts to switch them back.
Her desire to cling to him foils her husband's attempt to bring his wife back from the grave.
But first he must do away with Mrs. Preble, a formidable presence who eventually foils her husband's murder plot.
She never got the right steps in the right order to start a fire, but what foiled her was not her innate intelligence.
The fabled Scheherazade, who foiled her husband's murderous tendencies by telling him stories night after night (1,001 in all, counting her own), embodies the art of storytelling as salvation.
