Damn now you explained it i understand it mied miod honey zwiedz fetch?
miód -> miedź (through softening of the kind widely used in Slavic languages)
the second part is trickier, but probably
wiad -> wiedź (as in wiedzieć)
some think the root was jad (eat) but I'm not sure where the w cam from in that case
Germanic peoples also developed a taboo about the original word for bear and replaced with with words related to the meaning 'the brown one'.
Romance speakers never did develop such a taboo so in Romanian it's just urs... (Hungarian borrowed the name from Slavic - medve)