basin

noun
A wide bowl for washing, sometimes affixed to a wallA shallow bowl used for a single serving of a drink or liquidy foodA depression, natural or artificial, containing waterAn area of land from which water drains into a common outlet; drainage basinA rock formation scooped out by water erosion

verb
To create a concavity or depression in.To serve as or become a basin.To shelter or enclose in a basin.