tother (prep.)youdaoicibaDictYouDict[tother 词源字典]
"the other," early 13c., þe toþer, from faulty separation of þet oþer "that other;" simple use of tother in place of the other is attested by 1580s. Often written t'other as though a contraction of the other.[tother etymology, tother origin, 英语词源]