Insidious

Meaning

Proceeding in a gradual, subtle way but with harmful effects; treacherously harmful

Origin / Etymology

Latin insidiosus, cunning, deceitful (insidiae, ambush)

Synonyms

Stealthy Treacherous Surreptitious

Antonyms

Overt Transparent Forthright

Example Sentence

"Youth suicides represent an insidious social crisis, the damage accumulates silently before manifesting as a devastating public health emergency."

🎯 UPSC Usage

Use in Essay and GS4 (Ethics) when describing problems that are subtle, slow-building, and underestimated. Effective for topics like institutional erosion, climate change, mental health crises, and social inequality.

Relevant Subjects

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