IPA: /ˈɒptɪməli/
KK: /ˈɑptɪməli/
In the best or most effective way possible.
To achieve the best results, you should work optimally on your projects.
Optimally → It is formed from "optimus" (meaning best) and the suffix "-ally" (meaning in a manner). The word "optimally" means in the best manner or to the best degree.
Think of doing something in the "best" way — "optimus" means best, and "-ally" indicates the manner of doing it.