Starting With Insidious

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Definition of insidious

a. - Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; -- said of persons; as, the insidious foe.
a. - Intended to entrap; characterized by treachery and deceit; as, insidious arts.

insidiously insidiousness insidiousnesses

The word insidious is a 9 letter word that has 4 syllable 's . The syllable division for insidious is: in-sid-i-ous