underestimate

Such counts are widely believed to underestimate the true number of homeless people.

The Home Office underestimated how many zombie knives and machetes would be surrendered ahead of a recent ban, documents show.

"I underestimated people's appetite for the ludicrous, maybe."

It could underestimate the size of the problem, as gynaecology patients are less likely to be waiting for two appointments than patients in some other specialities.

The results imply that drought vulnerability analyses relying only on the historical streamflow record may severely underestimate the magnitude of potential drought events and their impacts on water storage, agriculture and municipal water supply.