shorten (v.)youdaoicibaDictYouDict[shorten 词源字典]
1510s, "make shorter;" 1560s, "grow shorter," from short (adj.) + -en (1); the earlier form of the verb was simply short, from Old English sceortian "to grow short, become short; run short, fail," gescyrtan "to make short."[shorten etymology, shorten origin, 英语词源]