The word "Hardock" is spelled with the IPA phonetic transcription /ˈhɑːrdək/. The first syllable is pronounced with a long "a" sound, followed by a soft "r." The second syllable features a schwa sound followed by a hard "d" and a short "o" sound. The final syllable contains a hard "k" sound. This word is a variant of the common name for the plant known as burdock, which has long been used for its medicinal properties and as a food source.
Dock with whitish leaves.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.