The word 'tang' entered English from Old Norse, a language that left a significant imprint on English vocabulary, particularly in its concrete and sensory terms. The Old Norse word 'tangi' originally referred to a sharp point, such as a spike or a narrow strip of land projecting into water. This core sense of a penetrating point evolved in two primary directions in English: one describing the sharp, penetrating flavor or smell, and the other the pointed metal shank of a tool that secures it to a handle. The journey from a physical point to an abstract sharp quality demonstrates a classic path of semantic extension, where a sensory experience (taste, smell) is metaphorically understood as a kind of mental or sensory "prick" or "point."

This word is a simplex form. It is a loanword from Old Norse 'tangi', meaning "point of land, spike, or tang of a knife," which is of Germanic origin. Its functional role is as a complete lexical root.