pretreat

/priːˈtriːt/
verb
  1. To treat or prepare something before a main process, especially to make it easier or more effective later.
    • You should pretreat the stain with a special spray before washing the shirt.
    • Farmers often pretreat seeds with fungicide to protect them from disease.
    • The wood needs to be pretreated with a preservative before painting.
Antonyms
What does "pretreat" mean? | whatsthatwordmean | whatsthatwordmean