noun A long narrow and shallow trough between ridges on a beach, running parallel to the coastline.
noun A shallow troughlike depression created to carry water during rainstorms or snow melts; a drainage ditch.
noun Bioswale, a shallow trough dug into the land on contour (horizontally with no slope), whose purpose is to allow water time to percolate into the soil.
noun A shallow, usually grassy depression sloping downward from a plains upland meadow or level vegetated ridgetop.
noun A gutter in a candle.
verb Alternative form of sweal (“melt and waste away, or singe”).