The word 'teabag' is a transparent compound formed in the 20th century from two established English nouns. 'Tea' entered English in the 17th century via Dutch traders from the Minnan Chinese 'tê', reflecting the global trade routes of the commodity. 'Bag' has Germanic origins, from Old Norse 'baggi', denoting a simple container. The compound logically describes the object's function: a bag designed to hold tea leaves for infusion. Its invention modernized tea preparation by offering a convenient, single-serving method, with the name directly mirroring its straightforward utility.

Structure: tea + bag - tea (noun): From the Chinese (Minnan dialect) word 'tê', via Dutch 'thee'. Refers to the dried leaves of the Camellia sinensis plant or the drink made from them. - bag (noun): From Old Norse 'baggi', meaning a pack, bundle, or sack. A flexible container.