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insidious
1 ENTRIES FOUND:
insidious
(adjective)
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insidious
/ɪn
ˈ
sɪdijəs/
adjective
insidious
/ɪn
ˈ
sɪdijəs/
adjective
Learner's definition of INSIDIOUS
[
more insidious; most insidious
]
formal
:
causing harm in a way that is gradual or not easily noticed
Most people with this
insidious
disease have no idea that they are infected.
an
insidious
enemy
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— insidiously
adverb
The disease progresses
insidiously
.
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— insidiousness
noun
[
noncount
]
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