Where does “numb” come from?

I appreciate the detailed instructions, but I notice a significant issue: the etymological chain provided traces "nim/nimen/niman" (meaning "to take" or "to steal"), but the headword is "numb" (meaning lacking sensation). These don't match—"numb" doesn't derive from the "nim" family. Could you clarify whether: 1. The headword should be "nim" instead of "numb"? 2. The chain should be different for "numb"? I want to ensure the sentence is accurate before writing it.

numb (English): Physically unable to feel, not having the power...