"Pestilentious" is a word in ENGLISH

A calculous concretion found in the intestines of certain ruminant animals (as the wild goat, the gazelle, and the Peruvian …

Conveying or generating disease; pestilential; poisonous; as, contagious air.

The valley of Hinnom, near Jerusalem, where some of the Israelites sacrificed their children to Moloch, which, on this account, …

To taint with morbid matter or any pestilential or noxious substance or effluvium by which disease is produced; as, to …

That which infects, or causes the communicated disease; any effluvium, miasm, or pestilential matter by which an infectious disease is …

Having qualities that may infect; communicable or caused by infection; pestilential; epidemic; as, an infectious fever; infectious clothing; infectious air; …

A person infected with a filthy or pestilential disease; a leper.

Noxious, pestilential, or foul exhalations from decomposing substances, filth, or other source.

A house or hospital for persons who are infected with any pestilential disease.

Pest-bearing; pestilential; noxious to health; malignant; infectious; contagious; as, pestiferous bodies.

Pestilential; noxious; pernicious; mischievous.

Hence: Mischievous; noxious; pernicious; morally destructive.

Having the nature or qualities of a pestilence.

Pestilently.

Abounding, or infecting, with plagues; pestilential; as, plagueful exhalations.

Any agent which, when introduced into the animal organism, is capable of producing a morbid, noxious, or deadly effect upon …