An Etymological Dictionary of the German Language/Annotated/schrötig
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schrötig, in ein verschrötiger Baum, ‘a tree from which four posts can be made,’ early Modern High German only, is probably connected with Old High German viorscôȥȥi, ‘four-cornered’; compare Middle Dutch vierscoot, ‘square-built, thick-set,’ earlier Low German vierschötig, ‘four-cornered’; compare Schoß (3).