'loop' originates from Middle English 'loupe' (also spelled 'loope'), ultimately influenced by Old Norse 'hlaup'/'hlaupa', where 'hlaupa' meant 'to leap' or 'to run'.

'loop' changed from the Middle English word 'loupe' (and variant spellings such as 'loope') and eventually became the modern English word 'loop' used for a curved or rounded shape.

Initially, it meant 'a leap or run' (related to motion), but over time it evolved into its current sense of 'a curved shape that returns to itself' and related senses (e.g., a repeated sequence).