systematic vowel variation in the forms of a root word that conveys grammatical information, e.g. sing, sang, sung; = ablaut
| 单词 | vowel gradation |
| 释义 | vowel gradationnounsystematic vowel variation in the forms of a root word that conveys grammatical information, e.g. sing, sang, sung; = ablaut |
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英语词典包含66266条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。