The word 'vending' originates from the Latin verb vendere, meaning 'to sell,' which itself is a compound of venum (something for sale) and dare (to give). This literal sense of 'giving something for sale' passed into English via French in the early 17th century. The addition of the Old English agentive suffix '-ing' transforms the action into a noun denoting the process or business of selling. Today, it is most specifically applied to the automated retail process conducted by machines, a modern specialization of its core meaning of selling.

Structure: vend (sell) + ing (noun suffix) - vend: From Latin vendere (to sell), from venum (sale) + dare (to give). Functions as the core verbal root. - ing: From Old English -ung, -ing, a suffix forming nouns of action. Functions as a deverbal noun suffix indicating the process or action.