'imprecisely-split' originates from the English word 'imprecise,' combined with 'split,' where 'im-' meant 'not' and 'precise' meant 'exact or accurate.'

'imprecise' changed from the Latin word 'imprecisus' and eventually became the modern English word 'imprecise.'

Initially, 'imprecise' meant 'not exact,' and this meaning has largely remained the same in modern usage.