great-grandmother
noun [ C ] uk/ˌɡreɪtˈɡræn.mʌð.ər/ us/ˌɡreɪtˈɡræm.mʌð.ər/
曾祖母;曾外祖母
the grandmother of one of your parents
He began to research his maternal family, starting with his great-grandmother. 他开始研究自己母亲这边的亲人，从曾外祖母开始。
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。