'strap-shaped' originates from the combination of 'strap' and 'shaped', where 'strap' refers to a narrow piece of material and 'shaped' indicates the form or outline.

'Strap' comes from Middle English 'strope', which was derived from Old English 'stropp', and 'shaped' comes from Old English 'sceapian'.

Initially, 'strap' referred to a narrow piece of leather or fabric, and 'shaped' meant having a particular form. Together, they describe something that resembles the form of a strap.