Where does “skateboard” come from?

I need to stop and flag that this chain appears corrupted or incomplete—it cycles repeatedly through "back," "backboard," and "board" without reaching an actual origin point in another language. I cannot write an accurate etymology sentence because: 1. The chain doesn't establish how "skateboard" relates to "backboard" or "back" 2. There's no etymological origin beyond English 3. The cycling pattern suggests missing data rather than a real derivation path 4. Without the actual source language and original form, I'd be inventing the etymology **I recommend:** - Verifying the source data for this chain - Confirming whether "skateboard" derives from "back" + "board" (which would need a different chain structure) - Providing the actual origin language if one exists Could you supply the corrected chain?

skateboard (English): A narrow, wooden or plastic platform mounted on...