— pestiferously , adv. — pestiferousness , n.
/pe stif"euhr euhs/ , adj.
1. bringing or bearing disease.
2. pestilential.
3. pernicious; evil.
4. Informal. mischievous; troublesome or annoying.
[ 1425-75; late ME pestiferus plague-bringing, equiv. to pesti- (s. of pestis ) PEST + -ferus -FEROUS ]