'trellis' originates from Old French, specifically the word 'trelis', where 'treille' meant 'arbor' or 'vine bower'.

'trelis' transformed into the Middle English word 'trelis', and eventually became the modern English word 'trellis'.

Initially, it meant 'arbor' or 'vine bower', but over time it evolved into its current meaning of 'a framework for climbing plants'.