sneaky; beguiling but harmful
The insidious disease spread silently through his body before symptoms appeared.
Vocabulary like insidious appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.
create; bring something new to an environment
a new idea or creation
introducing new and creative ideas
unlucky; not opportune
excessive; beyond normal limits
interrogator; a questioner who is excessively harsh
difficult to understand
unfeeling; incapable of physical sensation
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