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Webster's New World College Dictionary » pestilent
pestilent 
pestilent definition
pes·ti·lent (pes′tə lənt)
adjective
- likely to cause death; deadly
- Rare contagious; pestilential
- dangerous to the security and welfare of society; pernicious the pestilent threat of war
- annoying; troublesome
Etymology: ME < L pestilens < pestis, plague
Related Forms:
- pestilently pes′·ti·lently adverb
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