Where does “bow” come from?

I need to pause here because there's a significant problem with the chain provided. The chain shows a suffix etymology (-er, -arius, etc.), but the headword is "bow" (English), which is a noun/verb with a specific lexical meaning, not a suffix. These don't align—a suffix chain cannot explain the origin of the word "bow." Additionally, "Middle Dutch boech" appears to be related to "book" (boek), not "bow." **I cannot write an accurate one-sentence origin summary for "bow" using this chain**, as doing so would violate the rule to "state only what the chain supports" and would require me to invent connections. Could you clarify: 1. Is the headword actually a suffix (-er)? 2. Or is there a different etymological chain for "bow" that traces through these languages?

bow (English): A weapon made of a curved piece of wood or other...