'April' originates from Latin, specifically the word 'Aprilis', where 'aperire' meant 'to open'.

'April' changed from Latin 'Aprilis' through Medieval Latin and Old French forms (e.g. 'avril') and eventually became the modern English word 'April' via Middle English 'Aprille'.

Initially, it meant 'the month of opening (buds)', but over time it evolved into the modern proper name for the fourth month of the year.