'sharp-edged' originates from the combination of 'sharp' and 'edge', where 'sharp' meant 'having a fine point or edge' and 'edge' referred to 'the boundary or border of a surface'.

'sharp' and 'edge' have been used in English since Old English times, with 'sharp' coming from the Old English 'scearp' and 'edge' from 'ecg'.

Initially, it meant 'having a fine point or edge', and this meaning has largely remained the same in modern usage.