资料来源 : pyDict

[三面皆山的] 深陷的山谷;狭谷

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Coomb \Coomb\, Coombe \Coombe\, n. [See {Comb}, {Combe}, in this
   sense.]
   A hollow in a hillside. [Prov. Eng.] See {Comb}, {Combe}.