An Etymological Dictionary of the German Language/Annotated/Hast
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Hast, feminine, ‘haste, hurry,’ Modern High German simply; a Middle German and Low German word; compare Middle Dutch haas, feminine, Middle English haste, English haste; borrowed from Old French haste, hâte (compare Italian astivamente), which again correspond to the Old Teutonic cognates of Modern High German heftig; compare Old High German heisti, Anglo-Saxon hœ̂ste, ‘violent’ (Gothic haifsts, ‘dispute’).