The Only Use of
insidious
in
The Great Gatsby
- ...he saw Dan Cody's yacht drop anchor over the most insidious flat on Lake Superior.
p. 98.2insidious = dangerous in a way that is not easily seen
Definition:
not appearing dangerous, but actually very harmful over time
or:
treacherous (dangerous due to trickery or from hidden or unpredictable risks)
or:
treacherous (dangerous due to trickery or from hidden or unpredictable risks)