'budgetary' originates from the word 'budget', which comes from the Old French word 'bougette', meaning 'small bag'.

'bougette' transformed into the English word 'budget', and eventually led to the formation of the adjective 'budgetary'.

Initially, 'budget' referred to a 'small bag', but over time it evolved to mean a financial plan, leading to 'budgetary' relating to financial matters.