When switched off to save supply, the result was pestilential odor.
I long for the day I no longer have to think about this pestilential little locust.
late 14c., from Medieval Latin pestilentialis, from Latin pestilentia "plague" (see pestilence). Related: Pestilentially.
pestilential pes·ti·len·tial (pěs'tə-lěn'shəl)adj. Of, relating to, or tending to produce a pestilence.