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Adjective: costly (costlier,costliest)  kóst-lee
  1. Entailing great loss or sacrifice
    "a costly victory";
    - dearly-won
     
  2. Having a high price
    "costly jewellery";
    - dear, high-priced, pricey, pricy

Derived forms: costliest, costlier

See also: expensive

Encyclopedia: Costly