performing or functioning in the best possible manner with the least waste of time and effort; having and using requisite knowledge, skill, and industry; competent; capable: a reliable, efficient assistant.
Marengo is a village in Morrow County, Ohio, United States. The population was 342 at the 2010 census. Marengo is south of Mount Gilead, the county seat.
It was founded in 1810, before Marengo was a county or Alabama was a state. Most of the original settlers were veterans of the American Revolution, including John Sample, John Gilmore, and Reuben Hildreth. The village was named Jefferson in 1820, after Thomas Jefferson, and that year saw the first church established.