Artificial intelligent assistant

co-ploughing

co-ˈploughing
  [co- 1, 3 a.]
  Co-operative ploughing; = co-aration.

1883 Seebohm Eng. Vill. Commun. iv. iii. 121 And those who join in co-ploughing must bring a proper contribution. Ibid. 124 According to the Welsh laws it [the erw or acre] was the measure of a day's co-ploughing.

Oxford English Dictionary

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