English felt names a cloth that is neither spun nor woven. Wool, fur, or a mix of fibers is wetted, heated, and pressed until the scales lock and the mass becomes a dense sheet. The same word covers objects made from that sheet, especially hats, and, in everyday speech, the felt-tip pen. A related verb, to felt, means to mat fibers into that kind of cloth or to cover something with it.
A native English noun
Tracing the origin of the word felt leads first to Old English, not to a later borrowing from French or Latin. Speakers already used felt for the unwoven, compacted fabric, and the form has barely moved since. The Oxford English Dictionary places the noun in the Old English period, before 1150. Middle English kept it, with spellings such as felte, feltte, and feelte.
That stability is typical of a West Germanic inheritance. Old Saxon had filt, Middle Dutch vilt, Old High German filz. Those forms survive as German Filz, Dutch vilt, and the Scandinavian filt, which in Swedish can also mean a blanket. English did not import the cloth name from those neighbors in the Middle Ages; it inherited the same stock. French later looks similar for a different reason: feutre comes from Old French feltre, taken from Frankish, so the Romance word is a Germanic loan, not the source of the English one. Italian feltro and Spanish fieltro follow the same path.
Beaten wool, and a disputed root
The usual reconstruction is West Germanic feltaz or filtiz, a noun for something beaten or compressed, specifically wool worked into a mat. Most etymological handbooks derive that noun from a Germanic verb stem meaning to beat, and that stem from a Proto-Indo-European root pel- for thrusting, striking, or driving. The account fits the craft. Felt is made by pounding, rolling, and pressure, not by interlacing yarns on a loom.
Not every specialist accepts the beating story as the last word. One alternative ties the cloth name to Proto-Germanic fellą, hide or skin, on the idea that early felt was treated as a kind of artificial pelt. That link is not proven. Older reference works sometimes said the deeper root was simply unknown. The beating etymology remains the majority account in English dictionaries, including the American Heritage treatment under the Indo-European root pel- with the sense to strike or drive, but it is a reconstruction. Old English itself does not gloss the word as beaten stuff; later linguists inferred that sense from related forms.
If the majority analysis is right, felt sits with a few other English words that remember a blow. Anvil comes from Old English anfilt, something beaten on: a prefix meaning on plus the same Germanic element. Latin pellere, to push or drive, is often cited as a more distant relative of the same Indo-European base, which also fed English pulse, expel, and the verb pelt in the sense to strike. Those Latin descendants are useful as a family resemblance, not as the route by which felt entered English.
Outside Germanic, dictionaries often compare Latin pilleus, a felt cap, Greek pilos, felt, Old Church Slavonic plŭstĭ, and Albanian plis. The comparisons are widely repeated and not universally accepted as exact cognates. They at least show that compact, unwoven wool cloth had names in several Indo-European branches, whether or not every form goes back to one and the same prehistoric noun.
What the meaning did, and did not, do
The English noun did not wander far. Hats made of the cloth were common enough that felt could mean the hat itself. An older, now obsolete sense used felt for a skin or hide, overlapping with fell and pelt. That use is easy to confuse with the hide etymology mentioned above, but it is a later English sense, not proof of the prehistoric source.
From the early fourteenth century English had a verb to felt, first recorded around 1325, meaning to work wool into the fabric. Workshop uses followed: to felt a surface is to cover it, as on machinery. In poker slang, to felt a player is to take all of that player's chips, from the felted table. In the twentieth century the felt-tipped pen, attested from 1953, gave the noun a new everyday job as a writing tool. None of these later senses required a new etymology; they grew from the cloth and from objects covered with it.
A different felt is the past tense and past participle of feel. That form comes from Old English fēled, the regular dental preterite of the verb. It is a homograph, not a development of the cloth name. Compounds such as heartfelt and unfelt belong to that verbal family.
The long way round to filter
One of the clearest surviving traces of the old beating-and-matting sense is not felt itself but filter. Medieval Latin filtrum meant felt used to strain liquid. That Latin form was taken from West Germanic, the same stock as English felt. English then borrowed filter in the fifteenth century, with evidence from before 1425, at first as a piece of felt through which liquid was passed. The cloth word had never left English. The straining word came back through Latin and Old French.
That detour is the useful takeaway. Native felt stayed put from Old English onward. The same Germanic cloth, once it had been used as a strainer, could leave the language, pick up a Latin shape, and return as filter. The two English words no longer look like a pair, but they still share a workshop logic: a pad of felt can stop particles because the fibers have already been beaten into a barrier.