- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
acetaldehyde
-
tarquinius
-
reprovingly
-
incursion
-
abdominal actinomycosis
-
abidance
-
act of terrorism
-
cbc
-
swoop
-
man crush
- Hide translation
insidiously
insidiously /ɪnˈsɪdiəsli/
adverb
-
(
)
In a harmfully insidious manner
(
perniciously
, insidiously
)
in a harmfully insidious manner
These drugs act insidiously
these drugs act insidiously