Game of Thrones · 第 1 季
vocab111 / 186
whetstone
/ˈwɛtstəʊn/C1
磨刀石 (n.)
由 `whet`（磨快）和 `stone`（石头）合成的词，专门用来把刀剑等利器磨锋利的石头。
Well, my brother has his sword and I have my mind.
And a mind needs books like a sword needs a whetstone.
That's why I read so much, Jon Snow.