Smallpox is a pestilent disease.(天花是一種致命的疾病。)

I destroy all noisome and rank weeds, I keep down all pestilent vapours.(我摧毀了一切叢生的毒草，控制一切有害的煙霧。)

I'm glad to find another true-hearted loyalist in this pestilent, rebellious city.(在這個遭瘟的反叛城市里能找到另一個真心實意忠于王室的義士，我很高興。)

The research focuses on the flight of the pestilent locust, an insect renowned for its efficient flying style.(研究集中在蝗蟲——這種以高效飛行方式出名的害蟲——的飛行上。)

We have found this to be a pestilent man, and raising seditions among all the Jews throughout the world, and author of the sedition of the sect of the Nazarenes.(我們查出這人實在是個危險人物。他鼓動天下的一切猶太人作亂，又是納匝肋教派的魁首。)