'couplet' originates from French, specifically the word 'couplet,' which is a diminutive of 'couple,' meaning 'a pair.'

'Couplet' was borrowed directly from the French word 'couplet' in the late 16th century and became the modern English word 'couplet.'

Initially, it meant 'a little pair,' but over time it evolved into its current meaning of 'a pair of lines in poetry.'