They're not. Seems that unless you speak like a half-wit there's no way to avoid French based words. Damn snail-eating Normans!

The Normans were originally Norse, so if only they had kept their own language when they were given land in Gaul... Damn Romans.
The German in northern Germany (Plattdeutsch) also sounds more like English than standard German does. The southern Germanic dialects went through a couple of consonsant shifts in the early centuries A.D. that distinguish them from northern Germanic. In some words, p shifted to f, d shifted to t and so on. ship- Schiff, apple-Apfel, brother-Bruder, flat- platt, thing- Ding
Anglo-Saxon in its day was a prestige language, so we kept words like king from them. But then Norman became the prestige language, so English's Germanic roots are heard in earthy, homey kinds of subjects. House, home, hearth, wife, brother, sister, and so on. Farm animals tend to be the Germanic words, but the meat from them became the Norman. cow- beef, swine- pork etc.