say it: UHN-dur-tayk
undertake is a verb meaning "enter upon an activity or enterprise". It carries 5 recorded senses.
promise to do or accomplish
“guarantee to free the prisoners”
accept as a charge
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 undertake 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.