Never previously achieved and Optimum

Optimum and never previously achieved are semantically related. In some cases you can use "Optimum" instead an adjective phrase "Never previously achieved".

Optimum adjective - Most desirable possible under a restriction expressed or implied.

Never previously achieved and optimum are semantically related. You can use "Never previously achieved" instead an adjective "Optimum".

Nearby Words: optimal, optimization, optimize, optimise, optimally