1. (

• thwart ,
• cross_thwart

) a crosspiece spreading the gunnels of a boat; used as a seat in a rowboat ;

1. (

• thwart ,
• queer ,
• spoil ,
• scotch ,
• foil ,
• cross ,
• frustrate ,
• baffle ,
• bilk ,

) hinder or prevent (the efforts, plans, or desires) of; "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent" ;