gulf

gulf
noun

a deep inlet of the sea almost surrounded by land, with a narrow mouth
海湾
■(the Gulf). informal name for Persian Gulf
非正式同 Persian Gulf
a deep ravine, chasm, or abyss
沟壑；深坑；深渊
■(figurative)a large difference or division between two people or groups, or between viewpoints, concepts, or situations
(喻)鸿沟；（观点等的）巨大分歧
a wide gulf between theory and practice.
理论与实践之间的巨大差异。

语源

late Middle English: from Old French golfe, from Italian golfo, based on Greek kolpos 'bosom, gulf'