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say it: UHN-dur-pur-fawrm
underperform is a verb meaning "perform less well or with less success than expected". It carries 2 recorded senses.
perform less well or with less success than expected
“John consistently underachieves, although he is very able”
“My stocks underperformed last year”
perform too rarely
“Her plays are underperformed, although they are very good”
performing arts
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 underperform 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.