The Indo-European root of the word hope is a stem, K-E-U -- we would spell it K-E-U; it's pronounced koy -- and it is the same root from which the word curve comes from.
希望这个单词在印欧语系中 起源是K-E-U -- 我们都可以拼写 K-E-U, 它的发音和koy一样 -- 它跟单词curve是同一个起源.