say it: uhn-dur-RAYT
underrate is a verb meaning "make too low an estimate of". It is pronounced /ˌʌndɚˈɹeɪt/ — uhn-dur-RAYT. It carries one recorded sense.
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”
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 underrate 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.