See balk in Webster's New World Roget's A-Z Thesaurus II
verb
To prevent from accomplishing a purpose:
baffle, check, checkmate, defeat, foil, frustrate, stymie, thwart. (Informal) cross, stump. Idiom: cut the ground from under. See allow
noun
A large, oblong piece of wood or other material, used especially for construction:
beam, rafter, timber. See matter
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