copper bottomed
past tense of copper-bottom
/ˈkɑpər ˈbɑtəmd/
adjective
- Very reliable, secure, or trustworthy; certain to succeed or be of high quality.
- The bank offered a copper-bottomed guarantee on all its savings accounts.
- Her copper-bottomed reputation made her the top candidate for the job.
- We need a copper-bottomed plan before we invest any money.
Synonyms