pestiferous
[adjective]
Synonyms: pernicious, baneful, deadly, noxious, pestilent, pestilential

[TahlilGaran] English Synonym Dictionary ▲

pestiferous adjective. [pɛ'stɪf(ǝ)rǝs] LME.
[In branch I from Latin pestifer, from pestis plague + -fer: see -FEROUS. In branch II from French pestiféré.]
I.
1. Bringing or producing plague, pestilent; harmful, noxious, deadly. LME.

2. fig. Bearing moral contagion; pernicious. Now also (colloq.), irritating, annoying, constituting a pest or nuisance. LME.

[TahlilGaran] English Dictionary ▲

pestiferous
II.

3. Afflicted with a contagious disease, esp. the plague. M17.

■ pestiferously adverb M19.

[TahlilGaran] English Dictionary ▲