He had cancer, a particularly insidious form known as multiple myeloma.

We both agreed that taxes were an insidious form of government coercion.

Bias, in its many insidious forms, is a more dangerous enemy.

Many other female delegates came up against milder, but no less insidious, forms of opposition.

It's a subtle and insidious form of what was once called shell shock.

And there is probably no more insidious form of bullying than religion.

A subtle but insidious form of mind control is at work.

Quotas are the most insidious form of reverse discrimination against the innocent.

To let things carry on as they are is just a more insidious form of cruelty.

It was in this insidious form that servitude approached me.