I0055000 (ĭm-pĕk′ə-bəl)adj.1. Having no flaws; perfect. See Synonyms at perfect.2. Not capable of sinning or not liable to sin.[Latin impeccābilis : in-, not; see in-1 + peccāre, to sin; see ped- in Indo-European roots.]im·pec′ca·bil′i·ty n.im·pec′ca·bly adv.Thesaurus
Adv.
1.
impeccably - flawlessly; "the film was impeccably authentic"