INSIDIOUSLY

Pronunciation (US):

(GB):

 I. (adverb) 

Sense 1

Meaning:

In a harmfully insidious manner

Example:

these drugs act insidiously

Synonyms:

insidiously; perniciously

Classified under:

Adverbs

Pertainym:

insidious (working or spreading in a hidden and usually injurious way)

Credits