An Etymological Dictionary of the German Language/Busch
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Busch, m., ‘bush, thicket, plume (of a helmet),’ from MidHG. busch, bosch, OHG. busc, m., ‘bush, shrubbery, thicket, wood, cluster’; comp. E. bush, Du. bos, ‘cluster,’ bosch, ‘copse,’ bussel, ‘cluster.’ There are similar forms in Rom., Ital. bosco, Fr. bois, which are traced back to. a MidLat. buscus, boscus. — Allied to Büschel, ‘cluster,’ from MidHG. büschel, m.