IPA: /ˈpriːtriːt/
KK: /priˈtrit/
To apply a treatment to something before it is used or processed further.
Before painting, you should pretreat the wood to ensure better adhesion of the paint.
Past: pretreated
Past Participle: pretreated
Pretreat → It is formed from "pre-" (meaning before) and "treat" (from Latin "tractare", meaning to handle or deal with). The word "pretreat" means to handle or deal with something before the main treatment or process occurs.
Think of doing something 'before' ('pre-') you actually 'handle' ('tractare') it — that's why pretreat means to prepare something in advance.