'burdensome' originates from Middle English, specifically the word 'burdonsom,' where 'burden' meant 'a load or weight' and '-some' was a suffix indicating 'tending to or causing.'

'burdonsom' changed from Middle English word 'burdonsom' and eventually became the modern English word 'burdensome'.

Initially, it meant 'causing a heavy load or weight,' but over time it evolved into its current meaning of 'causing difficulty or worry.'