There have also been more insidious forces at work.

Over the years the album would become an insidious musical force, gradually gaining more and more underground attention.

He said inflation had been the most insidious force in concentrating wealth.

Learning to work together across geographic and cultural borders helps counter international crises and insidious forces that threaten humanity.

"Given the insidious forces arrayed against our cause, I can't afford to take any unnecessary chances."

"Even undug sites are suffering from these insidious forces of destruction."

A British man battles an insidious force.

Magic is an insidious force, a power that transcends our understanding and cannot be relied upon.

To opponents, it is an insidious force, a Jewish militant tendency, spreading its own sinister doctrine.

His reach is one of the most insidious and toxic forces in global politics today.