'bluster' originates from Middle Low German, specifically the word 'blüsteren,' where 'blüsteren' meant 'to blow violently.'

'blüsteren' transformed into the Middle English word 'blustren,' and eventually became the modern English word 'bluster.'

Initially, it meant 'to blow violently,' but over time it evolved into its current meaning of 'loud, aggressive talk or behavior.'