'swampy' originates from the word 'swamp', which comes from Middle English 'swampe', meaning 'a bog or marsh'.

'swampe' transformed into the modern English word 'swamp', and 'swampy' was derived from it to describe something resembling a swamp.

Initially, it meant 'a bog or marsh', and over time it evolved to describe anything resembling or characteristic of a swamp.