Racism is an insidious disease. unusual, harmful, contagious, invisible.

harmful.

Explanation:

The word insidious is an adjective used to describe nouns that are gradual, subtle but have harmful effects.

As such, racism which is the act of discriminating against people from different races is destructive and harmful.

The right option synonymous with insidious is harmful.

go

explanation:

because it can't be a slow, i would say possibly whoa, but there's nothing too surprising about orange juice, and because it tastes awesome it's a go drink, not food.

wow there were a thousand people in the concert. that’s great