say it: HAHR-nuhst
harnessed is an adjective meaning "brought under control and put to use". It is pronounced /ˈhɑɹnəst/ — HAHR-nuhst. It carries one recorded sense.
brought under control and put to use
“electricity from the harnessed Colorado River”
“the harnessed power of the atom”
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 harnessed 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.