305: ignoranus Oct 9, 2015

Some plural words from Latin or Greek are not pluralized with an 's', but this is not always the case. The word 'ignoramus' is a singular English noun from Latin, but the plural is 'ignoramuses'. The reason for it being so is that 'ignoramus' comes from a verb, meaning 'we do not know' (and the verb is already in the plural). The English word comes from George Ruggle's play, Ignoramus (1615), a satirical comedy exposing the ignorance lawyers.