English version


From Longman Dictionary of Contemporary Englishcopper-bottomedˌcopper-ˈbottomed adjective  able to be depended on a copper-bottomed guarantee
Examples from the Corpus
copper-bottomedThis was not only copper-bottomed security, it was a chance to play with the big numbers and see what happened.
From Longman Business Dictionarycopper-bottomedˌcopper-ˈbottomed adjective completely safe to buy, invest in, or have confidence inState pensions are supposed to have a copper-bottomed guarantee.
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