If you simplify something, you make it easier to understand or you remove the things which make it complex.
例句
...a plan to simplify the complex social security system...簡化復雜的社會保障體系的計劃He reduced his needs to the minimum by simplifying his life.他過上了一種簡單的生活，將自己的需求降到最低限度。
英英詞典釋義
Adjective
1. made easy or uncomplicated
2. reduced in complexity;
"a useful if somewhat simplified classification system"