The word "roback" can be defined as a surname or a word used in some specific games such as poker. Its spelling can be explained through IPA phonetic transcription as /ˈroʊ.bæk/. The first syllable "ro" is pronounced with the long "o" sound, while the second syllable "back" is pronounced with the "a" sound, similar to the word "cat." Overall, "roback" has a distinct and straightforward pronunciation, making it easy to remember and communicate with others.