Insidious 1100 Words You Need Week 41 Day 2

Insidious 1100 Words You Need Week 41 Day 2

Insidious 1100 Words You Need Week 41 Day 2

/ɪnˈsɪd.i.əs/ (adj)

secretly and gradually causing harm, causing harmful effects in a subtle way, sinister, treacherous, deceptive, devious,  stealthy, surreptitious, clandestine, cunning, crafty, sly, underhand, sneaky, pernicious

By the time pancreatic cancer is diagnosed, it’s almost always at a late stage of disease. The cancer is insidious; tumor cells hide deep inside the body, betraying no symptoms until after the cancer has spread to other organs.

Source: https://penntoday.upenn.edu/

Antonyms: harmless, benign

Noun: insidiousness

Adverb: insidiously