IPA: /ˈpriːˌwɒʃt/
KK: /priˈwɑʃt/
Washed by the manufacturer to make it softer or give it a faded look, often used for clothing and textiles.
I bought a pair of prewashed jeans that feel really soft.
Prewashed → It is formed from "pre-" (meaning before) and "washed" (from Old English "wascan", meaning to wash). The word "prewashed" means something that has been washed beforehand.
Think of something that has been 'washed before' — 'pre-' means before, and 'washed' refers to the act of cleaning.