Perfect

We won’t bother with the adjectival form of perfect, it is everywhere. Let’s jump right to the verb.

UC Berkeley will conduct research to perfect a microbial factory for the compound artemisinin, currently the most effective treatment for malaria. – UC Berkeley News

Per-fect’. (v) To improve or refine.

Brendan Gleeson has told RTÉ Entertainment that several takes were needed to perfect scenes in Paddington 2, and admits it was challenging trying to “keep the energy up” during filming. – RTE

It seems that the verb is almost always in its infinitive form: ‘to perfect‘ something or other. Perhaps it appears otherwise, but we stopped looking.

Zhang, 25, has been working to perfect her English for several years and now speaks the language with little difficulty. – China Daily