'sharp-angled' originates from the combination of 'sharp' and 'angle', where 'sharp' meant 'having a thin edge or point' and 'angle' referred to 'the space between two intersecting lines or surfaces'.

'Sharp' and 'angle' have been used in English since the Middle Ages, and their combination into 'sharp-angled' likely emerged as a descriptive term in modern English.

Initially, it meant 'having a sharp or acute angle', and this meaning has largely remained the same in modern usage.