Im*pec"ca*ble (?), a. [L.
impeccabilis; pref. im- not + peccare to err, to
sin: cf. F. impeccable.] Not liable to sin; exempt from
the possibility of doing wrong. -- n.
One who is impeccable; esp., one of a sect of Gnostic heretics
who asserted their sinlessness.
God is infallible, impeccable, and absolutely
perfect.
P. Skelton.