A hypothetical or dialectal term possibly referring to something that flies and has a felty texture, or a type of aircraft or device with felt-covered surfaces.
A compound of 'felty' and 'flier' (one who flies or a flying device). This appears to be an extremely rare or possibly obsolete term without clear documented etymology.
Many compound words in English exist in historical texts but have since become completely obsolete—feltyflier might be a genuine term from specialized trades (perhaps aviation or textile manufacturing) that simply didn't survive into modern English.
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