pestilent/ˈpɛstələnt/形容词比较级more pestilent形容词最高级most pestilent1有害的, 致命的extremely harmful and likely to cause disease especially in a widespread manner同义词： plagueypestilentialpestiferous2有害的, 烦人的causing intense discomfort or annoyance同义词： deadlybanefulpernicious3有害的, 道德败坏的morally wrong or harmful