mortiferous
adjective
mor·tif·er·ous
(ˈ)mȯ(r)¦tif(ə)rəs
: deadly, fatal
mortiferously adverb
mortiferousness noun
plural -es
Word History
Etymology
Latin mortifer, mortiferus, from morti- (from mort-, mors death) + -fer, -ferus -fer, -ferous