An Etymological Dictionary of Astronomy and Astrophysics

General: To make as effective, perfect, or useful as possible.
Math.:

To determine the maximum or minimum values of a specified function by systematically choosing the values of the variables from within an allowed set.

Etymology (EN): From opti(mum), → optimum, + → -ize.

Etymology (PE): Behinidan, from behin, → optimum, + -idan infinitive suffix. Behin sâxtan compound verb from behin + sâxtan, sâzidan “to build, make, fashion; to adapt, adjust, be fit” (from
Mid.Pers. sâxtan, sâz-, Manichean Parthian s’c’dn “to prepare, to form;” Av. sak- “to understand, to mark,” sâcaya- (causative) “to teach”).