Simpler or less complicated. More direct and straightforward, without any unnecessary embellishments.
"Plainer" Examples
Usage Examples for "Plainer"
1. Adjective Usage Without makeup and hair styling, she looked plainer than expected for her age. The simple, plainer design of the old-age home contrasted sharply with the luxurious living area where his father resided.##
2. Noun Usage The chef realized it was going to be harder to explain a plainer (a meringue mixture) if they served it as a separate dessert, so he added a layer underneath for the meringue to adhere to. As we prepared for the photo shoot, the photographer found that part of his equipment was buried in the plainer, and he had to ask for help from the crew to find the right cables.