interpret词源是什么

查词源字典上面是说"interpret"本身就可以当作一个词源late 14c., from Old French interpreter (13c.) and directly from Latin interpretari "explain, expound, understand," from interpres "agent, translator," 词源本身就是”解释”的意思如果还要细看的话，就是inter+pret, inter的词源很简单，就是between的意思，但是pret的词源不清晰，词源字典上说后面那部分来源无法确定(uncertain orgin)from inter- (see inter-) + second element of uncertain origin, perhaps related to Sanskrit prath- "to spread abroad," 但貌似这样没法和interpret的意思联系起来了...