sixteenth (adj.)youdaoicibaDictYouDict[sixteenth 词源字典]
early 13c., from sixteen + -th (1); replacing sixtethe, sixteothe, forms based on Old English syxteoða. Cf Old Frisian sextinda, Middle Dutch sestiende, German sechzehnte, Old Norse sextandi. Musical sixteenth note is from 1861.[sixteenth etymology, sixteenth origin, 英语词源]