Laxi Dictionary

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Definition copper-fasten in British English

copper-fasten verb

[transitive] verb
/ˈkɒpə(r) ˌfɑːs(ə)n/
1

to make certain or secure

Example

They had chances to copper-fasten the result but failed to take them.

Example

His recordings then and since have copper-fastened his status.

Synonyms and related words
make certain beyond (any) doubt confirm
Definition copper-fasten in British English