insidiously
adverb/ɪnˈsɪdiəsli/
/ɪnˈsɪdiəsli/
(formal, disapproving)- by spreading gradually or without being noticed, but causing serious harm
- This kind of advertising acts insidiously on young minds.
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
Check pronunciation:
insidiously