say it: UHN-dur-eh-stuh-mayt
underestimate is a verb and noun meaning "assign too low a value to". It carries 4 recorded senses.
assign too low a value to
“Don't underestimate the value of this heirloom-you may sell it at a good price”
make a deliberately low estimate
“The construction company wanted the contract badly and lowballed”
make too low an estimate of
“he underestimated the work that went into the renovation”
“Don't underestimate the danger of such a raft trip on this river”
an estimation that is too low; an estimate that is less than the true or actual value
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for underestimate come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.