agenda: [17] Agenda is the plural of Latin agendum, which is the gerundive form of the verb agere ‘do’ (see AGENT); it thus means literally ‘things to be done’. When the word first entered the language it was given an anglicized singular form, agend, with the plural agends, but this seems to have disappeared by the 18th century. The formal plurality of agenda is still often insisted on by purists, but it has been used as a singular noun since the mid 18th century. => act, agent
