The American English variant of coploughing; the act of plowing soil together with another person or tool.
American spelling variant of coploughing, from co- plus lowing. The 'ough' to 'ow' shift reflects the orthographic differences between British and American English that solidified in the 19th century.
Webster's push to simplify American spelling in the 1800s turned 'plough' into 'plow,' and co-lowing appears in early American agricultural records where pioneering communities literally shared their plows because they were expensive tools.
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