Underestimated

We might have underestimated his ability.

She beat me. I had underestimated the power of a woman.

I have underestimated the strength of my opponent.

The influence that the president's wife has on him should not be underestimated.

In Germany, the Italian mafia is an underestimated problem.

I underestimated Tom.

Tom underestimated Mary.

I've never underestimated Tom.

You've always underestimated Tom.

You've all underestimated Tom.