insidious
in
ɪn
in
si
ˈsɪ
si
dious
diəs
diēs
invidious

Definition & Meaning of "insidious"in English

insidious
01

designed to lure, ensnare, or catch someone in a deceitful way 

Grammatical Information
Composition
Simple
qualitative
Superlative
most insidious
Comparative
more insidious
gradable
Examples
The spy set an insidious trap for his target. 
02

gradually causing harm without being obvious at first 

Examples
The insidious erosion of trust damaged the team. 
03

(of illnesses or conditions) progressing unnoticed until advanced 

Examples
Diabetes can be insidious, showing no symptoms for years. 
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