ଅର୍ଥ : Exceedingly harmful.
ସମକକ୍ଷ : baneful, deadly, pernicious
ଅର୍ଥ : Likely to spread and cause an epidemic disease.
ଉଦାହରଣ :
A pestilential malignancy in the air.
Plaguey fevers.
ସମକକ୍ଷ : pestiferous, pestilential, plaguey