Where does “wave” come from?

I need to work through this chain carefully, but I notice some issues: 1. The chain provided appears malformed or unclear - "Middle English -y" doesn't fit as a language stage, and there are repeated "Proto-Indo-European -kos" entries 2. The connection between "wafian" (to wave/move back and forth) and "webʰ-" (to weave) makes semantic sense, but the chain then shows suffixes (-ium, -kos, -kos, -kos) without clear context 3. The "Known meaning: (unknown)" creates a problem since I'm instructed to weave in "the oldest one to explain the sense development" Given the instruction to "state only what the chain supports" and not invent steps, I cannot reliably construct an accurate sentence from this chain as presented. **Could you clarify:** - Is the chain meant to show

wave (English): To move back and forth repeatedly and somewhat...