"记住单词"在英文中常用的表达方式是"memorize words"或"learn words."

来源：

"Memorize"是由拉丁语"memorari"演变而来的，意思是"记住，留心"。

"Learn"是由古英语"leornian"演变而来的，意思是"学习，获得知识"。

例句及中文翻译：

I need to memorize these vocabulary words before the test. (我需要在考试前把这些词汇记住。)

I'm trying to learn as many new words as I can. (我正在尽力学习尽可能多的新单词。)

It's important to memorize the spelpng of each word. (记住每个单词的拼写很重要。)

I find it helpful to use flashcards when I'm trying to learn new words. (我发现使用抽认卡在学习新单词时很有帮助。)