Lacking energy or alertness; slow-moving or inactive. After the long flight, I felt sluggish and unmotivated to do anything.
Slow to respond or react; lacking in speed or efficiency. The sluggish internet connection made it difficult to stream the video smoothly.
Showing little activity, growth, or development; stagnant or slow to improve, especially of markets, economies, or performance. The company’s sales figures were sluggish during the first quarter.
Moving slowly or flowing with little speed or current, especially of a liquid or stream. The creek grew sluggish in the heat of midsummer.