The compound "trash-can" is a transparent American English formation from the mid-19th century, logically combining two simple nouns. "Trash," a word of obscure origin first appearing in English around the 14th century, likely relates to the concept of broken debris or worthless matter. "Can" has a much older pedigree, deriving from the Old English canne for a container, which is related to similar Germanic words for drinking vessels. The compound's formation follows a straightforward pattern where the first element specifies the contents ("trash") and the second element specifies the object's function ("can"), creating a highly literal term for a domestic waste receptacle.

Structure: trash (rubbish) + can (container) - trash: From Middle English trasshe, trass, of uncertain origin, possibly imitative of a crashing sound or from a Scandinavian source. Functions as the core noun denoting worthless material. - can: From Old English canne, meaning a cup, container, or vessel, of Germanic origin. Functions as the noun denoting the receptacle.