thwart, cross thwart -- (a crosspiece spreading the gunnels of a boat; used as a seat in a rowboat)
Overview of verb thwart
The verb thwart has 1 sense
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")