The spelling of the word "copperbar" can be explained using IPA phonetic transcription. The first syllable "cop" is pronounced as /ˈkɑp/ with a short "o" sound, while the second syllable "per" is pronounced as /pər/ with a short "e" sound. The final syllable "bar" is pronounced as /bɑr/ with a long "a" sound. The word "copperbar" refers to a type of alloy or material made from copper, and its unique spelling can be easily understood through its pronunciation.