insidiously
/ɪnˈsɪdiəsli/
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32764
in a gradual, subtle way, but with harmful effects. "anxiety insidiously infiltrates your thoughts and behavior"
adverb [方式副词] 阴险地；隐伏地；暗中为害地
Delusions are sometimes insidiously destructive. 妄想有时也具有潜在的破坏性。
