Noun


1. thwart, cross thwart, crosspiece

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

Verb


1. thwart, queer, spoil, scotch, foil, cross, frustrate, baffle, bilk, prevent, forestall, foreclose, preclude, forbid

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

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See also: thwart (Dictionary)