the word "wool" has a deep and ancient lineage, tracing back to the proto-indo-european root wel-, which carried the sense of "to tear, to pull," likely referring to the act of plucking or shearing the fleece. this root evolved into the proto-germanic wullō, a direct ancestor of the old english "wull." the semantic journey from an action ("to pull") to the material itself is a classic example of metonymy, where the product of an action gives its name to the substance. the modern english spelling "wool" stabilized in middle english, its simple, dense form perfectly mirroring the compact, fibrous nature of the material it describes.

the entire word "wool" is a simplex form. it is derived from old english "wull", which is of germanic origin.