Make too low an estimate of.

synonym: underestimate.

Roget 483: underrate, underestimate, undervalue, underreckon^†; depreciate; disparage etc. (detract) 934; not do justice to; misprize, disprize; ridicule etc. 856; slight etc. (despise) 930; neglect etc. 460; slur over.    make light of, make little of, make nothing of, make no account of; belittle; minimize, think nothing of; set no store by, set at naught; shake off as dewdrops from the lion's mane.    ... show more

Dutch: onderschatten