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.
