English主要词典
costly
Universal Words
adjective (costlier, costliest)
HELPNOTE You can also use more costly and most costly.
1 costing a lot of money, especially more than you want to pay:
Buying new furniture may prove too costly.
2 causing problems or the loss of sth:
a costly mistake / failure * Mining can be costly in terms of lives (= too many people can die).
costliness noun [U]
