Dictionary Check: pernicious

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"pernicious" is a valid word!

Scrabble 14 points
Words with Friends 18 points

Definition

adjective

exceedingly harmful

Synonyms:
baneful deadly pestilent
adjective

working or spreading in a hidden and usually injurious way

Example: "glaucoma is an insidious disease"
Synonyms:
insidious subtle

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