costliest
cost-li-est
adjective
Involving the greatest expense, sacrifice, or loss; most expensive.
"The new stadium was the costliest project."
Thesaurus
Synonyms: dear, high-priced, pricey, costly, expensive, pricy, dearly-won
cost-li-est
Involving the greatest expense, sacrifice, or loss; most expensive.
"The new stadium was the costliest project."
Synonyms: dear, high-priced, pricey, costly, expensive, pricy, dearly-won