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.
When touring Marengo, visitors are welcome to go through the Iowa County Courthouse. The current courthouse was completed in 1893 and placed on the National Register of Historic Places in June of 1980. Marengo's Pioneer Heritage Museum is a museum complex covering half a city block.