One of the mysteries of the English language finally explained.
Having the skills and knowledge necessary for living, working, etc., on a river; understanding the ways of the river.
1By river; along a river.
2In the manner of a river; riverlike.
3In relation or with reference to a river or rivers.
Early 20th century. From river + wise<br>mid 19th century; earliest use found in Railway Magazine. From river + -wise.
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