WordWeb Online

1. Disappointingly unsuccessful
   "disappointed expectations and thwarted ambitions"; "his best efforts were thwarted"; "defeated expectations and thwarted ambitions"; "discomfited expectations and thwarted ambitions";
   - defeated, disappointed, discomfited, foiled, frustrated, gutted [Brit, informal], crushed

1. Hinder or prevent (the efforts, plans, or desires) of
   "thwart your opponent";
   - queer [informal], spoil, scotch, foil, cross, frustrate, baffle, bilk [informal], scupper [informal]

See also: double-cross, unsuccessful

Type of: forbid, foreclose, forestall, preclude, prevent

Encyclopedia: Thwart