facinorous
adjective
fa·cin·o·rous
fəˈsinərəs
variants or less commonly facinerious
ˌfasəˈnirēəs
archaic
: atrociously wicked : infamous
facinorousness noun
plural -es
archaic 
Word History
Etymology
Latin facinorosus, facinerosus, from facinor-, facinus deed, evil deed, crime (from facere to do) + -osus -ous