形容词

1. 昂贵的;价格高的
If you say that something is costly, you mean that it costs a lot of money, often more than you would want to pay.

2. 造成严重损失的;代价大的
If you describe someone's action or mistake as costly, you mean that it results in a serious disadvantage for them, for example the loss of a large amount of money or the loss of their reputation.

1. having a high price

e.g. costly jewelry
high-priced merchandise
much too dear for my pocketbook
a pricey restaurant

Synonym: dear(p)high-pricedpriceypricy

2. entailing great loss or sacrifice

e.g. a dearly-won victory

Synonym: dearly-won