costly

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costly /ˈkɑːstli/ adjective
costlier; costliest
costly
/ˈkɑːstli/
adjective
costlier; costliest
Learner's definition of COSTLY
[also more costly; most costly]
: having a high price : costing a lot : expensive
: causing people to lose something or to suffer

— costliness

noun [noncount]
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