大だい母ぼ音いん推すい移い

noun

Great Vowel Shift

A major historical sound change in English pronunciation that occurred roughly between the 15th and 18th centuries, affecting long vowels. Used in linguistics contexts.

• 大だい母ぼ音いん推すい移いは、英えい語ごの長ちょう母ぼ音いんの発はつ音おんを大おおきく変かえた。

  The Great Vowel Shift significantly changed the pronunciation of long vowels in English.