In·er'ra·ble adjective [ Latin inerrabilis . See In- not, and Err .] Incapable of erring; infallible; unerring. ' Inerabble and requisite conditions.' Sir T. Browne. 'Not an inerrable text.' Gladstone. Found on http://www.encyclo.co.uk/webster/I/50
inerrantadjective not liable to error; `the Church was...theoretically inerrant and omnicompetent`-G.G.Coulton; `lack an inerrant literary sense`; `an unerring marksman` Found on https://www.encyclo.co.uk/local/20974