Definition of INSIDIOUSLY

insidiously

Meanings

Adverb

  • in a harmfully insidious manner
    • "these drugs act insidiously"

Adv

  • in an insidious manner

Origin / Etymology

From insidious + -ly.

Synonyms

perniciously

Scrabble Score: 15

insidiously is a valid Scrabble (US) TWL word
insidiously is a valid Scrabble Word in Merriam-Webster MW Dictionary
insidiously is a valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 17

insidiously is a valid Words With Friends word