INSIDIOUS
    
Meaning of INSIDIOUS in English
	
( a. )
 Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; -- said of persons; as, the insidious foe.
	
	
	Webster's Revised Unabridged English Dictionary.
    	Пересмотренный полный словарь английского языка Webster.
	2012