1620s, from errant + -ancy.
he denies the errancy of the Catholic Church
eroticism
eroticize
erotomania
erotomaniac
err
errancy
errand
errant
errata
erratic
erratum
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}