inerrant (adj.)youdaoicibaDictYouDict[inerrant 词源字典]
1650s, in reference to "fixed" stars (as opposed to "wandering" planets), from Latin inerrantem (nominative inerrans) "not wandering," from in- "not, opposite of" (see in- (1)) + errans, present participle of errare "to err" (see err).[inerrant etymology, inerrant origin, 英语词源]