cheap(便宜的)反义词是expensive(昂贵的)。
expensive 美 /ɪkˈspensɪv/英 /ɪkˈspensɪv/词典释义：adj.昂贵的；花钱的。比较级 more expensive最高级 most expensive双语例句：
1. I can't afford this expensive coat at the moment.2.The maintenance of imported cars is relatively expensive.3.This expensive product is targeted for rich people.