Synonyms of insidious in English:

insidious


See definition of insidious

adjective

1‘the insidious erosion of rights and liberties’

SYNONYMS

stealthy, subtle, surreptitious, sneaking, cunning, crafty, Machiavellian, artful, guileful, sly, wily, tricky, slick, deceitful, deceptive, dishonest, underhand, backhanded, indirect

informal sneaky

ANTONYMS

straightforward