INSIDIOUSLY

Pronunciation (US):

(GB):

 Dictionary entry overview: What does insidiously mean? 

• INSIDIOUSLY (adverb)
  The adverb INSIDIOUSLY has 1 sense:

1. in a harmfully insidious manner

  Familiarity information: INSIDIOUSLY used as an adverb is very rare.

 Dictionary entry details 

• INSIDIOUSLY (adverb)

Sense 1

Meaning:

In a harmfully insidious manner

Synonyms:

insidiously; perniciously

Context example:

these drugs act insidiously

Pertainym:

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

 Context examples 

Henry Jekyll stood at times aghast before the acts of Edward Hyde; but the situation was apart from ordinary laws, and insidiously relaxed the grasp of conscience.

(The Strange Case Of Dr. Jekyll And Mr. Hyde, by Robert Louis Stevenson)

Insidiously, and by remote ways, as well as by the power of stick and stone and clout of hand, were the shackles of White Fang's bondage being riveted upon him.

(White Fang, by Jack London)