felted

The word 'felt' descends from the Old English 'felt', which referred to the fabric itself. This term has cognates across Germanic languages, such as Old High German 'filz', and is traced back to the Proto-Indo-European root pel- meaning 'to beat' or 'to thrust'. This ancient sense directly captures the primary method of creating felt, which involves matting, condensing, and pressing fibers together through a process of beating and agitation. The modern adjective 'felted' thus logically describes the state of fibers or materials that have undergone this specific process to become a cohesive, non-woven fabric, maintaining a clear link from the action of its making to its final dense texture.

The word 'felted' is the past participle and adjective form of the verb 'felt'. The root 'felt' is a simplex word of Germanic origin, referring to the non-woven fabric. The suffix '-ed' is of Old English origin, here forming a participial adjective indicating the state or condition of being made into felt.