'unlimited-precision' originates from the combination of 'unlimited' and 'precision', where 'unlimited' means 'without limits' and 'precision' means 'exactness or accuracy'.

The term 'unlimited-precision' evolved from the need to describe computational or measurement systems that do not impose a fixed limit on the number of digits or accuracy.

Initially, it meant 'without limits in exactness', and this meaning has largely remained the same in modern usage.