coomb /ˈkum/ [三面皆山的] 深陷的山谷;狹谷
Coomb n. A dry measure of four bushels, or half a quarter. [Written also comb.] ◄ ►
Coomb, Coombe n. A hollow in a hillside. [Prov. Eng.] See Comb, Combe. ◄ ►