thwarting

(noun) an act of hindering someone's plans or efforts. Synonyms: frustration, foiling.

(verb) hinder or prevent (the efforts, plans, or desires) of. Synonyms: thwart, queer, spoil, scotch, foil, cross, frustrate, baffle, bilk. Examples: "What ultimately frustrated every challenger was ruth's amazing september surge." "Foil your opponent."

(adj) preventing realization or attainment of a desire. Synonyms: frustrating, frustrative.