ataxia (n.)youdaoicibaDictYouDict[ataxia 词源字典]
also anglicized as ataxy, "irregularity of bodily functions," 1610s, "confusion, disorder," medical Latin, from Greek ataxia, from a-, privative prefix, + taxis "arrangement, order," from stem of tassein "to arrange" (see tactics). Pathological sense is attested from 1660s.[ataxia etymology, ataxia origin, 英语词源]