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.
Marengo is located at 40Â°24â²5â³N 82Â°48â²37â³Wï»¿ / ï»¿40.40139Â°N 82.81028Â°Wï»¿ / 40.40139; -82.81028 (40.401341, -82.810382). It is considered to be a part of Central Ohio. According to the United States Census Bureau, the village has a total area of 0.17 square miles (0.44 km 2), all of it land.