An Etymological Dictionary of the German Language/Annotated/rücken
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rücken, verb, ‘to jerk,’ from Middle High German rücken, Old High German rucchen, ‘to push along’; Gothic *rukki, masculine, ‘jolt,’ and *rukkjan, ‘to jerk,’ are wanting; compare Old Icelandic rykkja, ‘to jerk,’ and rykkr, masculine, ‘jolt,’ Anglo-Saxon roccian, ‘to jerk,’ English to rock. rücken, verb; see Ruck.