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Definition of Copper-bottomed
1. Adjective. Having a bottom of copper or sheathed with copper. "A copper-bottomed ship"
Similar to: Bottomed
Definition of Copper-bottomed
1. Adjective. Having lower parts made of or covered by copper (especially of a ship or cookware). ¹
2. Adjective. (British idiomatic) Thoroughly reliable. ¹
¹ Source: wiktionary.com