optimum

nouns

most favorable conditions or greatest degree or amount possible under given circumstances
optimum
is derived from
optimal
is derived from
optimize
is derived from
optimise
is a type of (narrower)
that which is pleasing or valuable or useful
"weigh the good against the bad"; "among the highest goods of all are happiness and self-realization"
good, goodness

adjectives

most desirable possible under a restriction expressed or implied
"an optimum return on capital"; "optimal concentration of a drug"
optimal, optimum